{
    "id": 40137,
    "url": "https://svs.gsfc.nasa.gov/gallery/fermi-blazar/",
    "page_type": "Gallery",
    "title": "Fermi: Blazars",
    "description": "No description available.",
    "release_date": "2013-08-05T00:00:00-04:00",
    "update_date": "2024-04-22T00:00:00-04:00",
    "main_image": {
        "id": 505859,
        "url": "https://svs.gsfc.nasa.gov/vis/a020000/a020100/a020135/AGN0692_web.png",
        "filename": "AGN0692_web.png",
        "media_type": "Image",
        "alt_text": "In the heart of an active galaxy, matter falling toward a supermassive black hole creates jets of particles traveling near the speed of light. For active galaxies classified as blazars, one of these jets beams almost directly toward Earth.",
        "width": 180,
        "height": 320,
        "pixels": 57600
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    "media_groups": [
        {
            "id": 370731,
            "url": "https://svs.gsfc.nasa.gov/gallery/fermi-blazar/#media_group_370731",
            "widget": "Tile gallery",
            "title": "Visuals",
            "caption": "",
            "description": "",
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                        "id": 14399,
                        "url": "https://svs.gsfc.nasa.gov/14399/",
                        "page_type": "Produced Video",
                        "title": "Fermi's 14-Year Time-Lapse of the Gamma-Ray Sky",
                        "description": "From solar flares to black hole jets: NASA’s Fermi Gamma-ray Space Telescope has produced a unique time-lapse tour of the dynamic high-energy sky. Fermi Deputy Project Scientist Judy Racusin narrates this movie, which compresses 14 years of gamma-ray observations into 6 minutes. Credit: NASA’s Goddard Space Flight Center and NASA/DOE/LAT CollaborationMusic: \"Expanding Shell\" written and produced by Lars Leonhard.Watch this video on the NASA Goddard YouTube channel.Complete transcript available.Video descriptive text available. || Fermi_14Year_Narrated_Still_print.jpg (1024x576) [157.6 KB] || Fermi_14Year_Narrated_Still.jpg (3840x2160) [891.9 KB] || Fermi_14Year_Narrated_Still_searchweb.png (320x180) [39.2 KB] || Fermi_14Year_Narrated_Still_thm.png (80x40) [4.2 KB] || 14399_Fermi_14Year_Narrated_sub100.mp4 (1920x1080) [90.5 MB] || 14399_Fermi_14Year_Narrated_1080.webm (1920x1080) [49.4 MB] || 14399_Fermi_14Year_Narrated_1080.mp4 (1920x1080) [908.7 MB] || Fermi_14Year_Narrated_SRT_Captions.en_US.srt [8.4 KB] || Fermi_14Year_Narrated_SRT_Captions.en_US.vtt [8.0 KB] || 14399_Fermi_14Year_Narrated_4k.mp4 (3840x2160) [2.2 GB] || 14399_Fermi_14Year_Narrated_ProRes_3840x2160_2997.mov (3840x2160) [19.4 GB] || ",
                        "release_date": "2023-12-20T11:00:00-05:00",
                        "update_date": "2025-05-27T00:18:03.720500-04:00",
                        "main_image": {
                            "id": 1088009,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014399/Fermi_14Year_Narrated_Still_print.jpg",
                            "filename": "Fermi_14Year_Narrated_Still_print.jpg",
                            "media_type": "Image",
                            "alt_text": "From solar flares to black hole jets: NASA’s Fermi Gamma-ray Space Telescope has produced a unique time-lapse tour of the dynamic high-energy sky. Fermi Deputy Project Scientist Judy Racusin narrates this movie, which compresses 14 years of gamma-ray observations into 6 minutes. Credit: NASA’s Goddard Space Flight Center and NASA/DOE/LAT CollaborationMusic: \"Expanding Shell\" written and produced by Lars Leonhard.Watch this video on the NASA Goddard YouTube channel.Complete transcript available.Video descriptive text available.",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
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                },
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                    "id": 406047,
                    "type": "details_page",
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                    "instance": {
                        "id": 14309,
                        "url": "https://svs.gsfc.nasa.gov/14309/",
                        "page_type": "Produced Video",
                        "title": "Fermi Captures Dynamic Gamma-ray Sky",
                        "description": "Watch a cosmic gamma-ray fireworks show in this animation using just a year of data from the Large Area Telescope (LAT) aboard NASA’s Fermi Gamma-ray Space Telescope. Each object’s magenta circle grows as it brightens and shrinks as it dims. The yellow circle represents the Sun following its apparent annual path across the sky. The animation shows a subset of the LAT gamma-ray records now available for more than 1,500 objects in a new, continually updated repository. Over 90% of these sources are a type of galaxy called a blazar, powered by the activity of a supermassive black hole.Credit: NASA’s Marshall Space Flight Center/Daniel Kocevski || Fermi_LAT_LCR_Feb2022-Feb2023_Dark_ProRes_3840x2160.mov (3840x2160) [170.3 MB] || Fermi_LAT_LCR_Feb2022-Feb2023_Dark_1600.gif (1600x900) [6.5 MB] || Fermi_LAT_LCR_Feb2022-Feb2023_Dark_1050.gif (1050x590) [3.2 MB] || Fermi_LAT_LCR_Feb2022-Feb2023_Dark.gif (800x450) [2.1 MB] || Fermi_LAT_LCR_Feb2022-Feb2023_Dark_4k.mp4 (3840x2160) [12.1 MB] || Fermi_LAT_LCR_Feb2022-Feb2023_Dark_4k.webm (3840x2160) [1.9 MB] || ",
                        "release_date": "2023-03-15T11:00:00-04:00",
                        "update_date": "2023-05-03T11:43:40.048008-04:00",
                        "main_image": {
                            "id": 789250,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014309/Fermi_LAT_LCR_Still_print.jpg",
                            "filename": "Fermi_LAT_LCR_Still_print.jpg",
                            "media_type": "Image",
                            "alt_text": "Still image of the above.Credit: NASA’s Marshall Space Flight Center/Daniel Kocevski",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
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                },
                {
                    "id": 406048,
                    "type": "details_page",
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                        "id": 13696,
                        "url": "https://svs.gsfc.nasa.gov/13696/",
                        "page_type": "Produced Video",
                        "title": "Young Active Galaxy with ‘TIE Fighter’ Shape",
                        "description": "This illustration shows two views of the active galaxy TXS 0128+554, located around 500 million light-years away. Left: The galaxy’s central jets appear as they would if we viewed them both at the same angle. The black hole, embedded in a disk of dust and gas, launches a pair of particle jets traveling at nearly the speed of light. Scientists think gamma rays (magenta) detected by NASA’s Fermi Gamma-ray Space Telescope originate from the base of these jets. As the jets collide with material surrounding the galaxy, they form identical lobes seen at radio wavelengths (orange). The jets experienced two distinct bouts of activity, which created the gap between the lobes and the black hole. Right: The galaxy appears in its actual orientation, with its jets tipped out of our line of sight by about 50 degrees.Credit: NASA’s Goddard Space Flight Center || TXS0128_Side-by-Side_FInal.jpg (7680x2160) [1.8 MB] || TXS0128_Side-by-Side_FInal_Half.jpg (3840x1080) [601.5 KB] || TXS0128_Side-by-Side_FInal_print.jpg (1024x288) [45.4 KB] || TXS0128_Side-by-Side_FInal.jpg.dzi (7680x2160) [178 bytes] || TXS0128_Side-by-Side_FInal.jpg_files (1x1) [4.0 KB] || ",
                        "release_date": "2020-08-25T11:00:00-04:00",
                        "update_date": "2023-05-03T13:44:44.310639-04:00",
                        "main_image": {
                            "id": 383215,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013600/a013696/TXS0128_Illustration_perspective_FINAL_print.jpg",
                            "filename": "TXS0128_Illustration_perspective_FINAL_print.jpg",
                            "media_type": "Image",
                            "alt_text": "An unlabeled illustration of galaxy TXS 0128+554 in its actual orientation.Credit: NASA's Goddard Space Flight Center",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
                        }
                    }
                },
                {
                    "id": 406049,
                    "type": "details_page",
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                    "instance": {
                        "id": 13104,
                        "url": "https://svs.gsfc.nasa.gov/13104/",
                        "page_type": "Produced Video",
                        "title": "Tracing the History of Starlight with NASA's Fermi Mission",
                        "description": "Gamma rays from distant galaxies called blazars interact with starlight as they travel across the universe. As shown in this video, those reaching the Fermi Gamma-ray Space Telescope can help scientists learn about the history of star formation throughout the cosmos.Credit: NASA’s Goddard Space Flight CenterMusic: \"Inducing Waves\" from Killer TracksWatch this video on the NASA Goddard YouTube channel.Complete transcript available. || blazarEBL_Fog2-still.jpg (1920x1080) [165.1 KB] || blazarEBL_Fog2-still_print.jpg (1024x576) [53.5 KB] || blazarEBL_Fog2-still_searchweb.png (320x180) [50.2 KB] || blazarEBL_Fog2-still_thm.png (80x40) [4.5 KB] || 13104_Starlight_History_ProRes_1920x1080_2997.mov (1920x1080) [1.7 GB] || 13104_Starlight_History_1080p.mov (1920x1080) [205.4 MB] || 13104_Starlight_History_1080.mp4 (1920x1080) [138.8 MB] || 13104_Starlight_History_1080.m4v (1920x1080) [135.4 MB] || 13104_Starlight_History_1080.webm (1920x1080) [14.4 MB] || 13104_Starlight_History_SRT_Captions.en_US.srt [2.3 KB] || 13104_Starlight_History_SRT_Captions.en_US.vtt [2.2 KB] || ",
                        "release_date": "2018-11-29T14:00:00-05:00",
                        "update_date": "2023-05-03T13:46:15.862663-04:00",
                        "main_image": {
                            "id": 399343,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013100/a013104/blazarEBL_Fog2-still.jpg",
                            "filename": "blazarEBL_Fog2-still.jpg",
                            "media_type": "Image",
                            "alt_text": "Gamma rays from distant galaxies called blazars interact with starlight as they travel across the universe. As shown in this video, those reaching the Fermi Gamma-ray Space Telescope can help scientists learn about the history of star formation throughout the cosmos.\rCredit: NASA’s Goddard Space Flight CenterMusic: \"Inducing Waves\" from Killer Tracks\rWatch this video on the NASA Goddard YouTube channel.Complete transcript available.",
                            "width": 1920,
                            "height": 1080,
                            "pixels": 2073600
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                },
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                    "id": 406050,
                    "type": "details_page",
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                    "instance": {
                        "id": 13042,
                        "url": "https://svs.gsfc.nasa.gov/13042/",
                        "page_type": "Produced Video",
                        "title": "NASA's Fermi Mission Shows How Luck Favors the Prepared",
                        "description": "Explore how more than a century of scientific progress with gravitational waves, gamma rays and neutrinos has helped bring about the age of multimessenger astronomy. Music: \"Family Tree,\" \"The Archives\" and \"Beyond Truth,\" all from Killer Tracks.Credit: NASA’s Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.Complete transcript available. || Luck_Timeline_Still_print.jpg (1024x576) [140.7 KB] || Luck_Timeline_Still.jpg (3840x2160) [1.1 MB] || Luck_Timeline_Still_searchweb.png (320x180) [78.5 KB] || Luck_Timeline_Still_thm.png (80x40) [7.4 KB] || 13042_LuckFavorsThePrepared_1080p.mov (1920x1080) [550.2 MB] || 13042_LuckFavorsThePrepared_1080.mp4 (1920x1080) [373.6 MB] || 13042_LuckFavorsThePrepared_1080.m4v (1920x1080) [188.4 MB] || 13042_LuckFavorsThePrepared_1080p.webm (1920x1080) [39.3 MB] || 13042_LuckFavorsThePrepared_ProRes_3840x2160_2997.mov (3840x2160) [19.8 GB] || 13042_LuckFavorsThePrepared_2160.mp4 (3840x2160) [1.1 GB] || 13042_LuckFavorsThePrepared_4K.mov (3840x2160) [715.2 MB] || LuckFavorsThePrepared_SRT_Captions.en_US.srt [6.5 KB] || LuckFavorsThePrepared_SRT_Captions.en_US.vtt [6.3 KB] || ",
                        "release_date": "2018-11-08T13:00:00-05:00",
                        "update_date": "2023-05-03T13:46:17.525793-04:00",
                        "main_image": {
                            "id": 400940,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013000/a013042/Luck_Timeline_Still_print.jpg",
                            "filename": "Luck_Timeline_Still_print.jpg",
                            "media_type": "Image",
                            "alt_text": "Explore how more than a century of scientific progress with gravitational waves, gamma rays and neutrinos has helped bring about the age of multimessenger astronomy. Music: \"Family Tree,\" \"The Archives\" and \"Beyond Truth,\" all from Killer Tracks.Credit: NASA’s Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.Complete transcript available.",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
                        }
                    }
                },
                {
                    "id": 406051,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 13041,
                        "url": "https://svs.gsfc.nasa.gov/13041/",
                        "page_type": "Produced Video",
                        "title": "Fermi's Gamma-ray Burst Monitor",
                        "description": "The Gamma-ray Burst Monitor (GBM) is one of the instruments aboard the Fermi Gamma-ray Space Telescope. The GBM studies gamma-ray bursts, the most powerful explosions in the universe, as well as other flashes of gamma rays. Gamma-ray bursts are created when massive stars collapse into black holes or when two superdense stars merge, also producing a black hole. The GBM sees these bursts across the entire sky, and scientists are using its observations to learn more about the universe.Music:The Success by Keys of Moon | https://soundcloud.com/keysofmoonMusic promoted by https://www.free-stock-music.comCreative Commons Attribution 3.0 Unported Licensehttps://creativecommons.org/licenses/by/3.0/deed.en_USWatch this video on the NASA Goddard YouTube channel.Complete transcript available. || Fermi_GBM_Still_1.jpg (1920x1080) [231.2 KB] || Fermi_GBM_Still_1_searchweb.png (320x180) [43.6 KB] || Fermi_GBM_Still_1_thm.png (80x40) [4.9 KB] || 13041_Fermi_GBM_TOS_ProRes_1920x1080_24.mov (1920x1080) [811.2 MB] || 13041_Fermi_GBM_TOS_H264_1080p.mov (1920x1080) [59.2 MB] || 13041_Fermi_GBM_TOS_1080.mp4 (1920x1080) [84.9 MB] || 13041_Fermi_GBM_TOS_Apple_1080.m4v (1920x1080) [52.9 MB] || 13041_Fermi_GBM_TOS_ProRes_1920x1080_24.webm (1920x1080) [11.7 MB] || 13041_Fermi_GBM_TOS_SRT_Captions.en_US.srt [2.1 KB] || 13041_Fermi_GBM_TOS_SRT_Captions.en_US.vtt [2.0 KB] || ",
                        "release_date": "2018-08-17T14:00:00-04:00",
                        "update_date": "2023-05-03T13:46:30.379924-04:00",
                        "main_image": {
                            "id": 401060,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013000/a013041/Fermi_GBM_Still_1.jpg",
                            "filename": "Fermi_GBM_Still_1.jpg",
                            "media_type": "Image",
                            "alt_text": "The Gamma-ray Burst Monitor (GBM) is one of the instruments aboard the Fermi Gamma-ray Space Telescope. The GBM studies gamma-ray bursts, the most powerful explosions in the universe, as well as other flashes of gamma rays. Gamma-ray bursts are created when massive stars collapse into black holes or when two superdense stars merge, also producing a black hole. The GBM sees these bursts across the entire sky, and scientists are using its observations to learn more about the universe.Music:The Success by Keys of Moon | https://soundcloud.com/keysofmoonMusic promoted by https://www.free-stock-music.comCreative Commons Attribution 3.0 Unported Licensehttps://creativecommons.org/licenses/by/3.0/deed.en_USWatch this video on the NASA Goddard YouTube channel.Complete transcript available.",
                            "width": 1920,
                            "height": 1080,
                            "pixels": 2073600
                        }
                    }
                },
                {
                    "id": 406052,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 12994,
                        "url": "https://svs.gsfc.nasa.gov/12994/",
                        "page_type": "Produced Video",
                        "title": "NASA's Fermi Links Cosmic Neutrino to Monster Black Hole",
                        "description": "The discovery of a high-energy neutrino on Sept. 22, 2017, sent astronomers on a chase to locate its source -- a supermassive black hole in a distant galaxy. Watch to learn more.Credit: NASA’s Goddard Space Flight CenterMusic: \"Hidden Tides\" from Killer TracksWatch this video on the NASA Goddard YouTube channel.Complete transcript available. || Blazar.00590_print.jpg (1024x576) [61.2 KB] || Blazar.00590.png (3840x2160) [5.2 MB] || Blazar.00590.jpg (3840x2160) [536.3 KB] || Blazar.00590_searchweb.png (320x180) [46.6 KB] || Blazar.00590_thm.png (80x40) [4.6 KB] || 12994_Fermi_Blazar_Neutrino_1080p.webm (1920x1080) [17.1 MB] || 12994_Fermi_Blazar_Neutrino_1080.mp4 (1920x1080) [154.8 MB] || 12994_Fermi_Blazar_Neutrino_1080p.mov (1920x1080) [229.5 MB] || 12994_Fermi_Blazar_Neutrino_SRT_Captions.en_US.srt [2.8 KB] || 12994_Fermi_Blazar_Neutrino_SRT_Captions.en_US.vtt [2.7 KB] || 12994_Fermi_Blazar_Neutrino_H264_4k_2997.mp4 (3840x2160) [380.3 MB] || 12994_Fermi_Blazar_Neutrino_4K.mov (3840x2160) [445.0 MB] || 12994_Fermi_Blazar_Neutrino_ProRes_4k_2997.mov (3840x2160) [6.5 GB] || ",
                        "release_date": "2018-07-12T11:00:00-04:00",
                        "update_date": "2025-01-06T01:33:02.694445-05:00",
                        "main_image": {
                            "id": 402185,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012900/a012994/Blazar.00590_print.jpg",
                            "filename": "Blazar.00590_print.jpg",
                            "media_type": "Image",
                            "alt_text": "The discovery of a high-energy neutrino on Sept. 22, 2017, sent astronomers on a chase to locate its source -- a supermassive black hole in a distant galaxy. Watch to learn more.Credit: NASA’s Goddard Space Flight CenterMusic: \"Hidden Tides\" from Killer TracksWatch this video on the NASA Goddard YouTube channel.Complete transcript available.",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
                        }
                    }
                },
                {
                    "id": 406053,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 20281,
                        "url": "https://svs.gsfc.nasa.gov/20281/",
                        "page_type": "Animation",
                        "title": "Blazar Animations",
                        "description": "This animation shows the central supermassive black hole of a blazar.  The black hole is surrounded by a bright accretion disk and a darker torus of gas and dust.  A bright jet of particles emerges from above and below the black hole.  Collisions within the jet produce high-energy photons such as gamma rays. A flare from the blazar results in an additional burst of gamma rays and neutrinos. || BlazarProRes.00801_print.jpg (1024x576) [56.1 KB] || BlazarProRes.00801_searchweb.png (320x180) [63.8 KB] || BlazarProRes.00801_thm.png (80x40) [5.3 KB] || Blazar_1080_h264.mov (1920x1080) [46.2 MB] || Blazar_frames (3840x2160) [0 Item(s)] || BlazarProRes.webm (3840x2160) [4.2 MB] || BlazarProRes.mov (3840x2160) [3.0 GB] || Blazar_4444.mov (3840x2160) [6.2 GB] || Blazar_1080_h264.hwshow [69 bytes] || ",
                        "release_date": "2018-07-12T11:00:00-04:00",
                        "update_date": "2025-01-06T01:42:11.859086-05:00",
                        "main_image": {
                            "id": 402253,
                            "url": "https://svs.gsfc.nasa.gov/vis/a020000/a020200/a020281/BlazarProRes.00801_print.jpg",
                            "filename": "BlazarProRes.00801_print.jpg",
                            "media_type": "Image",
                            "alt_text": "This animation shows the central supermassive black hole of a blazar.  The black hole is surrounded by a bright accretion disk and a darker torus of gas and dust.  A bright jet of particles emerges from above and below the black hole.  Collisions within the jet produce high-energy photons such as gamma rays. A flare from the blazar results in an additional burst of gamma rays and neutrinos.",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
                        }
                    }
                },
                {
                    "id": 406054,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 12454,
                        "url": "https://svs.gsfc.nasa.gov/12454/",
                        "page_type": "Produced Video",
                        "title": "Fermi Finds the Farthest Blazars",
                        "description": "NASA's Fermi Gamma-ray Space Telescope has discovered the five most distant gamma-ray blazars yet known. The light detected by Fermi left these galaxies by the time the universe was two billion years old. Two of these galaxies harbor billion-solar-mass black holes that challenge current ideas about how quickly such monsters could grow.Watch this video on the NASA Goddard YouTube channel.Complete transcript available. || Distant_Blazars_Still.jpg (1920x1080) [493.4 KB] || Distant_Blazars_Still_searchweb.png (320x180) [74.1 KB] || Distant_Blazars_Still_thm.png (80x40) [5.6 KB] || 12454_Fermi_Distant_Blazars_ProRes_1920x1080_2997.mov (1920x1080) [2.4 GB] || 12454_Fermi_Distant_Blazars_FINAL_youtube_hq.mov (1920x1080) [1.0 GB] || 12454_Fermi_Distant_Blazars-H264_1080p.mov (1920x1080) [273.0 MB] || WMV_12454_Fermi_Distant_Blazars_FINAL_HD.wmv (1920x1080) [194.9 MB] || 12454_Fermi_Distant_Blazars-H264_Good_1080.m4v (1920x1080) [181.4 MB] || 12454_Fermi_Distant_Blazars_FINAL_appletv.m4v (1280x720) [87.3 MB] || 12454_Fermi_Distant_Blazars-H264_Compatible.m4v (960x540) [73.6 MB] || 12454_Fermi_Distant_Blazars_FINAL_appletv_subtitles.m4v (1280x720) [87.4 MB] || 12454_Fermi_Distant_Blazars-H264_Compatible.webm (960x540) [19.5 MB] || 12454_Fermi_Distant_Blazars_SRT_Captions.en_US.srt [3.1 KB] || 12454_Fermi_Distant_Blazars_SRT_Captions.en_US.vtt [3.1 KB] || ",
                        "release_date": "2017-01-30T11:00:00-05:00",
                        "update_date": "2023-05-03T13:47:58.860999-04:00",
                        "main_image": {
                            "id": 417784,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012400/a012454/Distant_Blazars_Still.jpg",
                            "filename": "Distant_Blazars_Still.jpg",
                            "media_type": "Image",
                            "alt_text": "NASA's Fermi Gamma-ray Space Telescope has discovered the five most distant gamma-ray blazars yet known. The light detected by Fermi left these galaxies by the time the universe was two billion years old. Two of these galaxies harbor billion-solar-mass black holes that challenge current ideas about how quickly such monsters could grow.Watch this video on the NASA Goddard YouTube channel.Complete transcript available.",
                            "width": 1920,
                            "height": 1080,
                            "pixels": 2073600
                        }
                    }
                },
                {
                    "id": 406055,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 12218,
                        "url": "https://svs.gsfc.nasa.gov/12218/",
                        "page_type": "Produced Video",
                        "title": "Fermi Helps Link a Cosmic Neutrino to a Blazar Outburst",
                        "description": "NASA Goddard scientist Roopesh Ojha explains how Fermi and TANAMI uncovered the first plausible link between a blazar eruption and a neutrino from deep space. Credit: NASA’s Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.Complete transcript available. || UniverseHD1845_print.jpg (1024x576) [135.3 KB] || UniverseHD1845_searchweb.png (320x180) [85.8 KB] || UniverseHD1845_web.png (180x320) [85.8 KB] || UniverseHD1845_thm.png (80x40) [6.3 KB] || UniverseHD1845.tif (1920x1080) [7.9 MB] || 12218_Fermi_Blazar_Neutrino_FINAL_appletv.webm (1280x720) [30.3 MB] || 12218_Fermi_Blazar_Neutrino_FINAL_appletv.m4v (1280x720) [138.0 MB] || 12218_Fermi_Blazar_Neutrino_FINAL_appletv_subtitles.m4v (1280x720) [138.1 MB] || 12218_Fermi_Blazar_Neutrino_H264_Good_1920x1080_2997.mov (1920x1080) [315.8 MB] || 12218_Fermi_Blazar_Neutrino.mp4 (1920x1080) [292.0 MB] || 12218_Fermi_Blazar_Neutrino_SRT_Captions.en_US.srt [4.8 KB] || 12218_Fermi_Blazar_Neutrino_SRT_Captions.en_US.vtt [4.8 KB] || 12218_Fermi_Blazar_Neutrino_FINAL_youtube_hq.mov (1920x1080) [1.3 GB] || 12218_Fermi_Blazar_Neutrino_FINAL_lowres.mp4 (480x272) [38.6 MB] || 12218_Fermi_Blazar_Neutrino_H264_Best_1920x1080_2997.mov (1920x1080) [2.3 GB] || 12218_Fermi_Blazar_Neutrino_ProRes_1920x1080_2997.mov (1920x1080) [3.6 GB] || ",
                        "release_date": "2016-04-28T12:00:00-04:00",
                        "update_date": "2025-01-06T01:30:30.156206-05:00",
                        "main_image": {
                            "id": 424901,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012200/a012218/Fermi_LAT_before_after_labels_1080_searchweb.png",
                            "filename": "Fermi_LAT_before_after_labels_1080_searchweb.png",
                            "media_type": "Image",
                            "alt_text": "Labeled version. Fermi LAT images showing the gamma-ray sky around the blazar PKS B1424-418. Brighter colors indicate greater numbers of gamma rays. The dashed arc marks part of the source region established by IceCube for the Big Bird neutrino (50-percent confidence level). Left: An average of LAT data centered on July 8, 2011, and covering 300 days when the blazar was inactive. Right: An average of 300 active days centered on Feb. 27, 2013, when PKS B1424-418 was the brightest blazar in this part of the sky. Credit: NASA/DOE/LAT Collaboration",
                            "width": 320,
                            "height": 180,
                            "pixels": 57600
                        }
                    }
                },
                {
                    "id": 406056,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 12004,
                        "url": "https://svs.gsfc.nasa.gov/12004/",
                        "page_type": "Produced Video",
                        "title": "NASA's Fermi Satellite Kicks Off a Blazar Bonanza",
                        "description": "Explore how gamma-ray telescopes in space and on Earth captured an outburst of high-energy light from PKS 1441+25, a black-hole-powered galaxy more than halfway across the universe.Credit: NASA's Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.For complete transcript, click here. || PKS_1441_still_1.png (1920x1080) [2.1 MB] || PKS_1441_still_1_print.jpg (1024x576) [45.3 KB] || PKS_1441_still_1_searchweb.png (320x180) [57.1 KB] || PKS_1441_still_1_thm.png (80x40) [7.6 KB] || PKS_1441_ProRes_1920x1080_2997.mov (1920x1080) [2.8 GB] || PKS_1441_H264_Best_1920x1080_2997.mov (1920x1080) [1.5 GB] || PKS_1441_H264_Good_1920x1080_2997.mov (1920x1080) [244.3 MB] || PKS_1441_Blazar_FINAL_youtube_hq.mov (1920x1080) [947.0 MB] || PKS_1441_1920x1080_4mbps.mp4 (1920x1080) [105.6 MB] || PKS_1441_Blazar_FINAL_appletv.m4v (1280x720) [126.1 MB] || PKS_1441_Blazar_FINAL_appletv.webm (1280x720) [26.3 MB] || PKS_1441_Blazar_FINAL_appletv_subtitles.m4v (1280x720) [126.2 MB] || PKS_1441_SRT_captions.en_US.srt [4.5 KB] || PKS_1441_SRT_captions.en_US.vtt [4.5 KB] || NASA_PODCAST_PKS_1441_Blazar_FINAL_ipod_sm.mp4 (320x240) [43.8 MB] || ",
                        "release_date": "2015-12-15T13:00:00-05:00",
                        "update_date": "2023-05-03T13:49:02.227751-04:00",
                        "main_image": {
                            "id": 439522,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012000/a012004/PKS_1441_still_1.png",
                            "filename": "PKS_1441_still_1.png",
                            "media_type": "Image",
                            "alt_text": "Explore how gamma-ray telescopes in space and on Earth captured an outburst of high-energy light from PKS 1441+25, a black-hole-powered galaxy more than halfway across the universe.Credit: NASA's Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.For complete transcript, click here.",
                            "width": 1920,
                            "height": 1080,
                            "pixels": 2073600
                        }
                    }
                },
                {
                    "id": 406057,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 11947,
                        "url": "https://svs.gsfc.nasa.gov/11947/",
                        "page_type": "Produced Video",
                        "title": "Fermi Spots a Record Flare from Blazar 3C 279",
                        "description": "This visualization shows gamma rays detected during 3C 279's big flare by the LAT instrument on NASA's Fermi satellite. The flare is an abrupt shower of \"rain\" that trails off toward the end of the movie. Gamma rays are represented as expanding circles reminiscent of raindrops on water. Both the maximum size of the circle and its color represent the energy of the gamma ray, with white lowest and magenta highest. The highest-energy gamma ray the LAT detected during this flare, 52 billion electron volts, arrives near the end. In a second version of the visualization, a background map shows how the LAT detects 3C 279 and other sources by accumulating high-energy photons over time (brighter squares reflect higher numbers of gamma rays). The movie starts on June 14 and ends June 17. The area shown is a region of the sky five degrees on a side and centered on the position of 3C 279.  Credit: NASA/DOE/Fermi LAT CollaborationWatch this video on the NASA Goddard YouTube channel.For complete transcript, click here. || Fermi_Rain_Still2.jpg (1920x1080) [144.1 KB] || Fermi_Rain_Still2_print.jpg (1024x576) [51.2 KB] || Fermi_Rain_Still2_searchweb.png (320x180) [24.0 KB] || Fermi_Rain_Still2_thm.png (80x40) [5.0 KB] || Fermi_GammaRay_Rain_Final_1080.m4v (1920x1080) [81.8 MB] || WMV_Fermi_GammaRay_Rain_Final_1280x720.wmv (1280x720) [24.3 MB] || APPLE_TV_Fermi_GammaRay_Rain_Final_appletv.m4v (1280x720) [39.3 MB] || YOUTUBE_HQ_Fermi_GammaRay_Rain_Final_youtube_hq.webm (1280x720) [8.5 MB] || APPLE_TV_Fermi_GammaRay_Rain_Final_appletv_subtitles.m4v (1280x720) [39.3 MB] || Fermi_GammaRay_Rain_1080p.mov (1920x1080) [110.6 MB] || Fermi_GammaRay_Rain_Final_ProRes_1920x1080_2997.mov (1920x1080) [530.3 MB] || Fermi_GammaRay_Rain_SRT_Captions.en_US.srt [415 bytes] || Fermi_GammaRay_Rain_SRT_Captions.en_US.vtt [428 bytes] || ",
                        "release_date": "2015-07-10T13:00:00-04:00",
                        "update_date": "2023-05-03T13:49:36.229616-04:00",
                        "main_image": {
                            "id": 442045,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011900/a011947/Fermi_Rain_Still2.jpg",
                            "filename": "Fermi_Rain_Still2.jpg",
                            "media_type": "Image",
                            "alt_text": "This visualization shows gamma rays detected during 3C 279's big flare by the LAT instrument on NASA's Fermi satellite. The flare is an abrupt shower of \"rain\" that trails off toward the end of the movie. Gamma rays are represented as expanding circles reminiscent of raindrops on water. Both the maximum size of the circle and its color represent the energy of the gamma ray, with white lowest and magenta highest. The highest-energy gamma ray the LAT detected during this flare, 52 billion electron volts, arrives near the end. In a second version of the visualization, a background map shows how the LAT detects 3C 279 and other sources by accumulating high-energy photons over time (brighter squares reflect higher numbers of gamma rays). The movie starts on June 14 and ends June 17. The area shown is a region of the sky five degrees on a side and centered on the position of 3C 279.  Credit: NASA/DOE/Fermi LAT CollaborationWatch this video on the NASA Goddard YouTube channel.For complete transcript, click here.",
                            "width": 1920,
                            "height": 1080,
                            "pixels": 2073600
                        }
                    }
                },
                {
                    "id": 406058,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 11117,
                        "url": "https://svs.gsfc.nasa.gov/11117/",
                        "page_type": "Produced Video",
                        "title": "NASA's Fermi Explores the Early Universe",
                        "description": "Astronomers using data from NASA's Fermi Gamma-ray Space Telescope have made the most accurate measurement of starlight in the universe and used it to establish the total amount of light from all of the stars that have ever shone, accomplishing a primary mission goal.Gamma rays are the most energetic form of light. Since Fermi's launch in 2008, its Large Area Telescope (LAT) observes the entire sky in high-energy gamma rays every three hours, creating the most detailed map of the universe ever known at these energies. The total sum of starlight in the cosmos is known to astronomers as the extragalactic background light (EBL). To gamma rays, the EBL functions as a kind of cosmic fog. Ajello and his team investigated the EBL by studying gamma rays from 150 blazars, or galaxies powered by black holes, that were strongly detected at energies greater than 3 billion electron volts (GeV), or more than a billion times the energy of visible light. As matter falls toward a galaxy's supermassive black hole, some of it is accelerated outward at almost the speed of light in jets pointed in opposite directions. When one of the jets happens to be aimed in the direction of Earth, the galaxy appears especially bright and is classified as a blazar.Gamma rays produced in blazar jets travel across billions of light-years to Earth. During their journey, the gamma rays pass through an increasing fog of visible and ultraviolet light emitted by stars that formed throughout the history of the universe. Occasionally, a gamma ray collides with starlight and transforms into a pair of particles — an electron and its antimatter counterpart, a positron. Once this occurs, the gamma ray light is lost. In effect, the process dampens the gamma-ray signal in much the same way as fog dims a distant lighthouse. From studies of nearby blazars, scientists have determined how many gamma rays should be emitted at different energies. More distant blazars show fewer gamma rays at higher energies — especially above 25 GeV — thanks to absorption by the cosmic fog. The farthest blazars are missing most of their higher-energy gamma rays.The researchers then determined the average gamma-ray attenuation across three distance ranges between 9.6 billion years ago and today. From this measurement, the scientists were able to estimate the fog's thickness. To account for the observations, the average stellar density in the cosmos is about 1.4 stars per 100 billion cubic light-years. To put this in another way, the average distance between stars in the universe is about 4,150 light-years.See the media briefing page here. || ",
                        "release_date": "2012-11-01T14:00:00-04:00",
                        "update_date": "2023-05-03T13:52:39.426432-04:00",
                        "main_image": {
                            "id": 471433,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011100/a011117/blazarFinal_cdewilde.02963.jpg",
                            "filename": "blazarFinal_cdewilde.02963.jpg",
                            "media_type": "Image",
                            "alt_text": "This animation tracks several gamma rays through space and time, from their emission in the jet of a distant blazar to their arrival in Fermi's Large Area Telescope (LAT). During their journey, the number of randomly moving ultraviolet and optical photons (blue) increases as more and more stars are born in the universe. Eventually, one of the gamma rays encounters a photon of starlight and the gamma ray transforms into an electron and a positron. The remaining gamma-ray photons arrive at Fermi, interact with tungsten plates in the LAT, and produce the electrons and positrons whose paths through the detector allows astronomers to backtrack the gamma rays to their source. This version has music and additional elements on it.  For an animation-only version, go here.Credit: NASA's Goddard Space Flight Center/Cruz deWildeWatch this video on the NASAexplorer YouTube channel.For complete transcript, click here.",
                            "width": 1280,
                            "height": 720,
                            "pixels": 921600
                        }
                    }
                },
                {
                    "id": 406059,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 10819,
                        "url": "https://svs.gsfc.nasa.gov/10819/",
                        "page_type": "Produced Video",
                        "title": "Fermi's Latest Gamma-ray Census Highlights Cosmic Mysteries",
                        "description": "Every three hours, NASA's Fermi Gamma-ray Space Telescope scans the entire sky and deepens its portrait of the high-energy universe. Every year, the satellite's scientists reanalyze all of the data it has collected, exploiting updated analysis methods to tease out new sources. These relatively steady sources are in addition to the numerous transient events Fermi detects, such as gamma-ray bursts in the distant universe and flares from the sun.Earlier this year, the Fermi team released its second catalog of sources detected by the satellite's Large Area Telescope (LAT), producing an inventory of 1,873 objects shining with the highest-energy form of light. More than half of these sources are active galaxies whose supermassive black hole centers are causing the gamma-ray emissions. || ",
                        "release_date": "2011-09-09T09:00:00-04:00",
                        "update_date": "2023-05-03T13:53:38.663881-04:00",
                        "main_image": {
                            "id": 483805,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010819/Blazar_Still_2.jpg",
                            "filename": "Blazar_Still_2.jpg",
                            "media_type": "Image",
                            "alt_text": "Active galaxies called blazars make up the largest class of objects detected by Fermi's Large Area Telescope (LAT). Massive black holes in the hearts of these galaxies fire particle jets in our direction. Fermi team member Elizabeth Hays narrates this quick tour of blazars, which includes LAT movies showing how rapidly their emissions can change. Credit: NASA/Goddard Space Flight Center/CI LabWatch this video on the NASAexplorer YouTube channel.For complete transcript, click here.",
                            "width": 1280,
                            "height": 720,
                            "pixels": 921600
                        }
                    }
                },
                {
                    "id": 406060,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 12317,
                        "url": "https://svs.gsfc.nasa.gov/12317/",
                        "page_type": "Produced Video",
                        "title": "NASA's Fermi Mission Broadens its Dark Matter Search",
                        "description": "Top: Gamma rays (magenta lines) coming from a bright source like NGC 1275 in the Perseus galaxy cluster should form a particular type of spectrum (right). Bottom: Gamma rays convert into hypothetical axion-like particles (green dashes) and back again when they encounter magnetic fields (gray curves). The resulting gamma-ray spectrum (lower curve at right) would show unusual steps and gaps not seen in Fermi data, which means a range of these particles cannot make up a portion of dark matter.Credit: SLAC National Accelerator Laboratory/Chris Smith || ALP_2_sequences.gif (1074x580) [211.8 KB] || ",
                        "release_date": "2016-08-12T13:00:00-04:00",
                        "update_date": "2023-05-03T13:48:24.423680-04:00",
                        "main_image": {
                            "id": 421560,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012300/a012317/smc_dm_split.jpg",
                            "filename": "smc_dm_split.jpg",
                            "media_type": "Image",
                            "alt_text": "The Small Magellanic Cloud (SMC), at center, is the second-largest satellite galaxy orbiting our own. This image superimposes a photograph of the SMC with one half of a model of its dark matter (right of center). Lighter colors indicate greater density and show a strong concentration toward the galaxy's center. Ninety-five percent of the dark matter is contained within a circle tracing the outer edge of the model shown. In six years of data, Fermi finds no indication of gamma rays from the SMC's dark matter.Credits: Dark matter, R. Caputo et al. 2016; background, Axel Mellinger, Central Michigan University",
                            "width": 1920,
                            "height": 1024,
                            "pixels": 1966080
                        }
                    }
                },
                {
                    "id": 406061,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 10505,
                        "url": "https://svs.gsfc.nasa.gov/10505/",
                        "page_type": "Produced Video",
                        "title": "Blazars at Galactic North Pole, Seen in Fermi's First Year of Observations",
                        "description": "Fermi has detected more than 1,000 gamma-ray sources. Half are associated with active galaxies called blazars. This movie shows one year of blazar activity, starting on Aug. 4, 2008, around the galactic north pole. This region includes the constellations Ursa Major, Virgo, Leo, Boötes, and Coma Berenices. || ",
                        "release_date": "2009-10-28T01:45:00-04:00",
                        "update_date": "2024-10-10T00:15:46.497720-04:00",
                        "main_image": {
                            "id": 495498,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010505/Fermi_North_Pole_640x480.00102_print.jpg",
                            "filename": "Fermi_North_Pole_640x480.00102_print.jpg",
                            "media_type": "Image",
                            "alt_text": "Galactic north pole map of blazars observed by Fermi, without overlays.",
                            "width": 1024,
                            "height": 1024,
                            "pixels": 1048576
                        }
                    }
                },
                {
                    "id": 406062,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 10407,
                        "url": "https://svs.gsfc.nasa.gov/10407/",
                        "page_type": "Produced Video",
                        "title": "Fermi All-sky Movie Shows Flaring, Fading Blazars",
                        "description": "This all-sky movie shows counts of gamma rays with energies greater than 300 million electron volts from August 4 to October 30, 2008, detected by Fermi's Large Area Telescope. Brighter colors indicate brighter gamma-ray sources. The circles show the northern (left) and southern galactic sky. Their edges lie along the plane of our galaxy, the Milky Way. Because this is an unusual view of the sky, the movies first overlay the stars and establish the locations of well- known constellations: Ursa Major (which includes the Big Dipper), Boötes, and Virgo in the northern galactic map; Cetus, Aries, and Pegasus in the southern galactic map. Notable gamma-ray sources include the sun (moving through the northern sky), the gamma-ray-only pulsar PSR J1836+5925 — a member of a new pulsar class discovered by Fermi — and numerous blazars (active galaxies). The blazars 3C 273, AO 0235+164, and PKS 1502+106 are highlighted. || ",
                        "release_date": "2009-04-03T14:00:00-04:00",
                        "update_date": "2023-05-03T13:54:51.330497-04:00",
                        "main_image": {
                            "id": 499092,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010400/a010407/Fermi_North_South_Tour_512x288.00002_print.jpg",
                            "filename": "Fermi_North_South_Tour_512x288.00002_print.jpg",
                            "media_type": "Image",
                            "alt_text": "This all-sky movie shows Fermi LAT counts of gamma rays with energies greater than 300 million electron volts from August 4 to October 30, 2008. Brighter colors indicate brighter gamma-ray sources. The circles show the northern (left) and southern galactic sky. Their edges lie along the plane of our galaxy, the Milky Way.",
                            "width": 1024,
                            "height": 576,
                            "pixels": 589824
                        }
                    }
                },
                {
                    "id": 406063,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 10540,
                        "url": "https://svs.gsfc.nasa.gov/10540/",
                        "page_type": "Produced Video",
                        "title": "Brightest-ever Flare From Blazar 3C 454.3",
                        "description": "The blazar 3C 454.3, which lies 7.2 billion light-years away in the constellation Pegasus, underwent a series of intense flares in the fall of 2009. By December, it had become the brightest persistent gamma-ray source in the sky — more than ten times brighter than it was in the summer. These all-sky images, which record the numbers of high-energy gamma-rays captured by Fermi's Large Area Telescope on Dec. 3 and Nov. 18, clearly show the change. Typically, the Vela pulsar, which lies only 1,000 light-years away, is the sky's brightest persistent source of gamma rays. Blazar 3C 454.3, which is millions of times farther away, rose to twice Vela's brightness. Astronomers suspect the activity is driven by some change within the galaxy's black-hole-powered particle jet, but they do not understand the details. || ",
                        "release_date": "2009-12-09T10:00:00-05:00",
                        "update_date": "2023-05-03T13:54:27.204984-04:00",
                        "main_image": {
                            "id": 495163,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010500/a010540/All-sky_comparison_no_labels_FullRes.jpg",
                            "filename": "All-sky_comparison_no_labels_FullRes.jpg",
                            "media_type": "Image",
                            "alt_text": "Dissolve showing change in brightness of Blazar 3C 454.3",
                            "width": 1488,
                            "height": 1119,
                            "pixels": 1665072
                        }
                    }
                },
                {
                    "id": 406064,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 11563,
                        "url": "https://svs.gsfc.nasa.gov/11563/",
                        "page_type": "Produced Video",
                        "title": "Black Hole 'Batteries' Keep Blazars Going and Going",
                        "description": "Astronomers studying two classes of black-hole-powered galaxies monitored by NASA's Fermi Gamma-ray Space Telescope have found evidence that they represent different sides of the same cosmic coin. By unraveling how these objects, called blazars, are distributed throughout the universe, the scientists suggest that apparently distinctive properties defining each class more likely reflect a change in the way the galaxies extract energy from their central black holes.Active galaxies possess extraordinarily luminous cores powered by black holes containing millions or even billions of times the mass of the sun. As gas falls toward these supermassive black holes, it settles into an accretion disk and heats up. Near the brink of the black hole, through processes not yet well understood, some of the gas blasts out of the disk in jets moving in opposite directions at nearly the speed of light.  Blazars are the highest-energy type of active galaxy and emit light across the spectrum, from radio to gamma rays.  Astronomers think blazars appear so intense because they happen to tip our way, bringing one jet nearly into our line of sight.Astronomers have identified two models in the blazar line. One, known as flat-spectrum radio quasars (FSRQs), show strong emission from an active accretion disk, much higher luminosities, smaller black hole masses and lower particle acceleration in the jets. The other, called BL Lacs, are totally dominated by the jet emission, with the jet particles reaching much higher energy and the accretion disk emission either weak or absent.Large galaxies grew out of collisions and mergers with many smaller galaxies, and this process occurs with greater frequency as we look back in time. These collisions provided plentiful gas to the growing galaxy and kept the gas stirred up so it could more easily reach the central black hole, where it piled up into a vast, hot, and bright accretion disk like those seen in \"gas-guzzling\" FSRQs. Some of the gas near the hole powers a jet while the rest falls in and gradually increases the black hole's spin.As the universe expands and the density of galaxies decreases, so do galaxy collisions and the fresh supply of gas they provide to the black hole. The accretion disk becomes depleted over time, but what's left is orbiting a faster-spinning and more massive black hole. These properties allow BL Lac objects to maintain a powerful jet even though relatively meager amounts of material are spiraling toward the black hole.In effect, the energy of accretion from the galaxy's days as an FSRQ becomes stored in the increasing rotation and mass of its black hole, which acts much like a battery. When the gas-rich accretion disk all but disappears, the blazar taps into the black hole's stored energy that, despite a lower accretion rate, allows it to continue operating its particle jet and producing high-energy emissions as a BL Lac object. || ",
                        "release_date": "2014-06-10T10:00:00-04:00",
                        "update_date": "2023-05-03T13:50:50.312302-04:00",
                        "main_image": {
                            "id": 454616,
                            "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011500/a011563/AGN_Transition-Before.jpg",
                            "filename": "AGN_Transition-Before.jpg",
                            "media_type": "Image",
                            "alt_text": "What astronomers once thought were two blazar families may in fact be one, as shown in this artist's concept. Energy stored in the black hole during its salad days of intense accretion may later be tapped by the blazar to continue its high-energy emissions long after this gas has been depleted.",
                            "width": 1920,
                            "height": 1080,
                            "pixels": 2073600
                        }
                    }
                },
                {
                    "id": 406065,
                    "type": "details_page",
                    "extra_data": null,
                    "instance": {
                        "id": 11130,
                        "url": "https://svs.gsfc.nasa.gov/11130/",
                        "page_type": "Produced Video",
                        "title": "Fermi Observation of Early Background Light Animation",
                        "description": "This animation tracks several gamma rays through space and time, from their emission in the jet of a distant blazar to their arrival in Fermi's Large Area Telescope (LAT). During their journey, the number of randomly moving ultraviolet and optical photons (blue) increases as more and more stars are born in the universe. Eventually, one of the gamma rays encounters a photon of starlight and the gamma ray transforms into an electron and a positron. The remaining gamma-ray photons arrive at Fermi, interact with tungsten plates in the LAT, and produce the electrons and positrons whose paths through the detector allows astronomers to backtrack the gamma rays to their source. || ",
                        "release_date": "2012-11-01T14:00:00-04:00",
                        "update_date": "2025-01-06T01:27:04.943680-05:00",
                        "main_image": {
                            "id": 471033,
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