Watch this video on the NASAexplorer YouTube channel.
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For complete transcript, click here.", "items": [ { "id": 326440, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 482281, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010861/What_Are_Gamma_Rays_H264_Good_1280x720_29.97.00352_print.jpg", "filename": "What_Are_Gamma_Rays_H264_Good_1280x720_29.97.00352_print.jpg", "media_type": "Image", "alt_text": "What are Gamma rays. Interviews in short video.Watch this video on the NASAexplorer YouTube channel.For complete transcript, click here.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 326438, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 482277, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010861/What_Are_Gamma_Rays_H264_Good_1280x720_29.97_web.png", "filename": "What_Are_Gamma_Rays_H264_Good_1280x720_29.97_web.png", "media_type": "Image", "alt_text": "What are Gamma rays. 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For complete transcript, click here.", "items": [ { "id": 326451, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 482283, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010861/What_Is_A_Pulsar_Still.png", "filename": "What_Is_A_Pulsar_Still.png", "media_type": "Image", "alt_text": "What is a Pulsar. Narrated short video.For complete transcript, click here.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 326452, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 482292, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010861/What_Is_A_Pulsar_Still_web.png", "filename": "What_Is_A_Pulsar_Still_web.png", "media_type": "Image", "alt_text": "What is a Pulsar. 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galaxy other than our own.Credit: NASA's Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.For complete transcript, click here. || LMC_Pulsar_Multi.jpg (1920x1080) [634.9 KB] || LMC_Pulsar_Multi_print.jpg (1024x576) [191.7 KB] || LMC_Pulsar_Multi_searchweb.png (320x180) [72.6 KB] || LMC_Pulsar_Multi_thm.png (80x40) [4.8 KB] || LMC_Pulsar_ProRes_1920x1080_2997.mov (1920x1080) [2.8 GB] || LMC_Pulsar_H264_Best_1920x1080_2997.mov (1920x1080) [2.6 GB] || LMC_Pulsar_H264_Good_1920x1080_2997.mov (1920x1080) [668.4 MB] || G2015-084_LMC_Pulsar_Final_youtube_hq.mov (1920x1080) [1.5 GB] || LMC_Pulsar_MPEG4_1920X1080_2997.mp4 (1920x1080) [176.4 MB] || G2015-084_LMC_Pulsar_Final_appletv.m4v (1280x720) [112.5 MB] || LMC_Pulsar_Multi.tiff (1920x1080) [15.8 MB] || G2015-084_LMC_Pulsar_Final_appletv.webm (1280x720) [24.1 MB] || G2015-084_LMC_Pulsar_Final_appletv_subtitles.m4v (1280x720) [112.6 MB] || LMC_Pulsar_SRT_Captions.en_US.srt [3.8 KB] || LMC_Pulsar_SRT_Captions.en_US.vtt [3.9 KB] || NASA_PODCAST_G2015-084_LMC_Pulsar_Final_ipod_sm.mp4 (320x240) [40.8 MB] || ", "release_date": "2015-11-12T14:00:00-05:00", "update_date": "2023-05-03T13:49:07.709890-04:00", "main_image": { "id": 439492, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012000/a012003/LMC_Pulsar_Multi.jpg", "filename": "LMC_Pulsar_Multi.jpg", "media_type": "Image", "alt_text": "Explore Fermi's discovery of the first gamma-ray pulsar detected in a galaxy other than our own.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": 11261, "url": "https://svs.gsfc.nasa.gov/11261/", "page_type": "Produced Video", "title": "NASA's Fermi, Swift See 'Shockingly Bright' Gamma-ray Burst", "description": "A record-setting blast of gamma rays from a dying star in a distant galaxy has wowed astronomers around the world. The eruption, which is classified as a gamma-ray burst, or GRB, and designated GRB 130427A, produced the highest-energy light ever detected from such an event.The GRB lasted so long that a record number of telescopes on the ground were able to catch it while space-based observations were still ongoing.Just after 3:47 a.m. EDT on Saturday, April 27, Fermi's Gamma-ray Burst Monitor (GBM) triggered on an eruption of high-energy light in the constellation Leo. The burst occurred as NASA's Swift satellite was slewing between targets, which delayed its Burst Alert Telescope's detection by less than a minute. Fermi's Large Area Telescope (LAT) recorded one gamma ray with an energy of at least 94 billion electron volts (GeV), or some 35 billion times the energy of visible light, and about three times greater than the LAT's previous record. The GeV emission from the burst lasted for hours, and it remained detectable by the LAT for the better part of a day, setting a new record for the longest gamma-ray emission from a GRB.The burst subsequently was detected in optical, infrared and radio wavelengths by ground-based observatories, based on the rapid accurate position from Swift. Astronomers quickly learned that the GRB was located about 3.6 billion light-years away, which for these events is relatively close.Gamma-ray bursts are the universe's most luminous explosions. Astronomers think most occur when massive stars run out of nuclear fuel and collapse under their own weight. As the core collapses into a black hole, jets of material shoot outward at nearly the speed of light. The jets bore all the way through the collapsing star and continue into space, where they interact with gas previously shed by the star and generate bright afterglows that fade with time. If the GRB is near enough, astronomers usually discover a supernova at the site a week or so after the outburst. This GRB is in the closest 5 percent of bursts, so ground-based observatories are monitoring its location in hopes of finding an underlying supernova. || ", "release_date": "2013-05-03T12:00:00-04:00", "update_date": "2023-05-03T13:52:11.580337-04:00", "main_image": { "id": 465852, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011261/GRB_LAT_B4_AFTER_2.jpg", "filename": "GRB_LAT_B4_AFTER_2.jpg", "media_type": "Image", "alt_text": "These maps, both centered on the north galactic pole, show how the sky looks at gamma-ray energies above 100 million electron volts (MeV). The first frame shows the sky during a three-hour interval prior to GRB 130427A. The second frame shows a three-hour interval starting 2.5 hours before the burst, and ending 30 minutes into the event. The Fermi team chose this interval to demonstrate how bright the burst was relative to the rest of the gamma-ray sky. This burst was bright enough that Fermi autonomously left its normal surveying mode to give the LAT instrument a better view, so the three-hour exposure following the burst does not cover the whole sky in the usual way. Credit: NASA/DOE/Fermi LAT Collaboration", "width": 1080, "height": 1080, "pixels": 1166400 } }, { "id": 10858, "url": "https://svs.gsfc.nasa.gov/10858/", "page_type": "Produced Video", "title": "Fermi Discovers Youngest Millisecond Pulsar", "description": "An international team of scientists using NASA's Fermi Gamma-ray Space Telescope has discovered a surprisingly powerful millisecond pulsar that challenges existing theories about how these objects form. At the same time, another team has exploited improved analytical techniques to locate nine new gamma-ray pulsars in Fermi data.A pulsar, also called a neutron star, is the closest thing to a black hole astronomers can observe directly, crushing half a million times more mass than Earth into a sphere no larger than a city. This matter is so compressed that even a teaspoonful weighs as much as Mount Everest.Typically, millisecond pulsars are a billion years or more old, ages commensurate with a stellar lifetime. But in the Nov. 3 issue of Science, the Fermi team reveals a bright, energetic millisecond pulsar only 25 million years old.The object, named PSR J1823—3021A, lies within NGC 6624, a spherical assemblage of ancient stars called a globular cluster, one of about 160 similar objects that orbit our galaxy. The cluster is about 10 billion years old and lies about 27,000 light-years away toward the constellation Sagittarius.\"With this new batch of pulsars, Fermi now has detected more than 100, which is an exciting milestone when you consider that before Fermi's launch only seven of them were known to emit gamma rays,\" said Pablo Saz Parkinson, an astrophysicist at the Santa Cruz Institute for Particle Physics, University of California Santa Cruz. || ", "release_date": "2011-11-03T14:00:00-04:00", "update_date": "2023-05-03T13:53:29.855000-04:00", "main_image": { "id": 482468, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010858/01_Paolo_Fermi_newpulsars.jpg", "filename": "01_Paolo_Fermi_newpulsars.jpg", "media_type": "Image", "alt_text": "This plot shows the positions of nine new pulsars (magenta) discovered by Fermi and of an unusual millisecond pulsar (green) that Fermi data reveal to be the youngest such object known. With this new batch of discoveries, Fermi has detected more than 100 pulsars in gamma rays. Credit: Credit: AEI and NASA/DOE/Fermi LAT Collaboration", "width": 1692, "height": 1173, "pixels": 1984716 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }