{ "count": 22, "next": null, "previous": null, "results": [ { "id": 13042, "url": "https://svs.gsfc.nasa.gov/13042/", "result_type": "Produced Video", "release_date": "2018-11-08T13:00:00-05:00", "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] || ", "hits": 132 }, { "id": 12136, "url": "https://svs.gsfc.nasa.gov/12136/", "result_type": "Produced Video", "release_date": "2016-01-28T11:00:00-05:00", "title": "Galactic Flare", "description": "NASA's Fermi mission detects an outburst of high-energy light from a source more than halfway across the universe. || c-1920.jpg (1920x1080) [858.8 KB] || c-1280.jpg (1280x720) [558.0 KB] || c-1024.jpg (1024x576) [400.0 KB] || c-1024_print.jpg (1024x576) [406.8 KB] || c-1024_searchweb.png (320x180) [157.4 KB] || c-1024_web.png (320x180) [157.4 KB] || c-1024_thm.png (80x40) [29.0 KB] || ", "hits": 69 }, { "id": 12004, "url": "https://svs.gsfc.nasa.gov/12004/", "result_type": "Produced Video", "release_date": "2015-12-15T13:00:00-05:00", "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] || ", "hits": 70 }, { "id": 11895, "url": "https://svs.gsfc.nasa.gov/11895/", "result_type": "Produced Video", "release_date": "2015-07-02T10:00:00-04:00", "title": "Astronomers Predict Cosmic Light Show from 2018 Stellar Encounter", "description": "Coming attraction: Astronomers are expecting high-energy explosions when pulsar J2032 swings around its massive companion star in early 2018. The pulsar will plunge through a disk of gas and dust surrounding the star, triggering cosmic fireworks. Scientists are planning a global campaign to watch the event across the spectrum, from radio waves to gamma rays. Credit: NASA's Goddard Space Flight CenterWatch this video on the NASA Goddard YouTube channel.For complete transcript, click here. || Binary_Pulsar_Still.png (1920x1080) [2.0 MB] || Binary_Pulsar_Still_print.jpg (1024x576) [88.4 KB] || Binary_Pulsar_Still_searchweb.png (320x180) [74.7 KB] || Binary_Pulsar_Still_thm.png (80x40) [8.1 KB] || 11895_Fermi_Binary_Pulsar_.mov (1920x1080) [1.5 GB] || 11895_Fermi_Binary_Pulsar_-H264_Best_1920x1080_29.97.mov (1920x1080) [523.1 MB] || 11895_Fermi_Binary_Pulsar_-H264_Good_1080_29.97.mov (1920x1080) [77.1 MB] || YOUTUBE_HQ_G2015-051_Fermi_Binary_Pulsar_FINAL_VX-171746_youtube_hq.mov (1280x720) [174.9 MB] || 11895_Fermi_Binary_Pulsar_MPEG4_1920X1080_2997.mp4 (1920x1080) [53.1 MB] || WMV_G2015-051_Fermi_Binary_Pulsar_FINAL_VX-171746_1280x720.wmv (1280x720) [48.3 MB] || APPLE_TV_G2015-051_Fermi_Binary_Pulsar_FINAL_VX-171746_appletv.m4v (1280x720) [71.5 MB] || 11895_Fermi_Binary_Pulsar_.webm (1920x1080) [14.4 MB] || APPLE_TV_G2015-051_Fermi_Binary_Pulsar_FINAL_VX-171746_appletv_subtitles.m4v (1280x720) [71.6 MB] || 11895_Fermi_Binary_Pulsar_SRT_Captions.en_US.srt [1.8 KB] || 11895_Fermi_Binary_Pulsar_SRT_Captions.en_US.vtt [1.8 KB] || ", "hits": 101 }, { "id": 10170, "url": "https://svs.gsfc.nasa.gov/10170/", "result_type": "Produced Video", "release_date": "2014-11-20T14:00:00-05:00", "title": "Highlights of Swift's Decade of Discovery", "description": "A collection of some of Swift's most noteworthy and interesting discoveries and observations from its ten years of viewing the sky.Watch this video on the NASA Goddard YouTube channel.For complete transcript, click here. || Swift_still_print.jpg (1024x576) [115.9 KB] || Swift_still.png (2560x1440) [3.3 MB] || Swift_still_thm.png (80x40) [9.6 KB] || Swift_still_web.jpg (320x180) [20.8 KB] || Swift_still_searchweb.png (320x180) [92.0 KB] || Swift_10_Highlights_H264_Good_1280x720_29.97.webmhd.webm (960x540) [80.6 MB] || G2014-067_Swift_10_Highlights_FINAL_appletv_subtitles.m4v (960x540) [153.8 MB] || G2014-067_Swift_10_Highlights_FINAL_1280x720.wmv (1280x720) [166.6 MB] || Swift_10_Highlights_MPEG4_1280X720_29.97.mp4 (1280x720) [123.7 MB] || G2014-067_Swift_10_Highlights_FINAL_appletv.m4v (960x540) [154.0 MB] || Swift_10_Highlights_H264_Good_1280x720_29.97.mov (1280x720) [351.9 MB] || G2014-067_Swift_10_Highlights_FINAL_youtube_hq.mov (1280x720) [352.2 MB] || G2014-067_Swift_10_Highlights_FINAL_ipod_lg.m4v (640x360) [62.8 MB] || Swift_10_Highlights_SRT_Captions.en_US.vtt [7.2 KB] || Swift_10_Highlights_SRT_Captions.en_US.srt [7.2 KB] || Swift_10_Highlights_H264_640x360_29.97_iPhone.m4v (640x360) [67.4 MB] || G2014-067_Swift_10_Highlights_FINAL_ipod_sm.mp4 (320x240) [32.6 MB] || Swift_10_Highlights_H264_Best_1280x720_59.94.mov (1280x720) [2.5 GB] || Swift_10_Highlights_ProRes_1280x720_59.94.mov (1280x720) [5.2 GB] || ", "hits": 89 }, { "id": 11567, "url": "https://svs.gsfc.nasa.gov/11567/", "result_type": "Produced Video", "release_date": "2014-07-22T10:00:00-04:00", "title": "PSR J1023, A 'Transformer' Pulsar—Animations", "description": "Pulsar J1023 is a member of an exceptional binary system containing a rapidly spinning neutron star. In June 2013, the pulsar underwent a dramatic change in behavior never before observed. Its radio beacon vanished, while at the same time the system brightened significantly in gamma rays, the highest-energy form of light.The stellar system, known as AY Sextantis and located about 4,400 light-years away in the constellation Sextans, pairs a 1.7-millisecond pulsar named PSR J1023+0038 — J1023 for short — with a star containing about one-fifth the mass of the sun. The stars complete an orbit in only 4.8 hours, which places them so close together that a high-energy \"wind\" of charged particles from the pulsar is gradually evaporating its companion. What's happening, astronomers say, are the last sputtering throes of the pulsar spin-up process, where a flow of matter from the companion has, over millions of years, dramatically increased the pulsar's rotation. J1023 now spins at about 35,000 rpm, but the gas stream from the companion is no longer continuous. Researchers regard the system as a unique laboratory for understanding how millisecond pulsars form and for studying details of how accretion takes place on neutron stars. || ", "hits": 428 }, { "id": 11609, "url": "https://svs.gsfc.nasa.gov/11609/", "result_type": "Produced Video", "release_date": "2014-07-22T10:00:00-04:00", "title": "NASA's Fermi Catches a 'Transformer' Pulsar", "description": "In late June 2013, an exceptional binary system containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA's Fermi Gamma-ray Space Telescope.The system, known as AY Sextantis, is located about 4,400 light-years away in the constellation Sextans. It pairs a 1.7-millisecond pulsar named PSR J1023+0038 — J1023 for short — with a star containing about one-fifth the mass of the sun. The stars complete an orbit in only 4.8 hours, which places them so close together that the pulsar will gradually evaporate its companion. To better understand J1023's spin and orbital evolution, the system was routinely monitored in radio. These observations revealed that the pulsar's radio signal had turned off and prompted the search for an associated change in its gamma-ray properties.What's happening, astronomers say, are the last sputtering throes of the pulsar spin-up process. Researchers regard the system as a unique laboratory for understanding how millisecond pulsars form and for studying details of how accretion takes place on neutron stars. In J1023, the stars are close enough that a stream of gas flows from the sun-like star toward the pulsar. The pulsar's rapid rotation and intense magnetic field are responsible for both the radio beam and its powerful pulsar wind. When the radio beam is detectable, the pulsar wind holds back the companion's gas stream, preventing it from approaching too closely. But now and then the stream surges, pushing its way closer to the pulsar and establishing an accretion disk. When gas from the disk falls to an altitude of about 50 miles (80 km), processes involved in creating the radio beam are either shut down or, more likely, obscured. Some of the gas may be accelerated outward at nearly the speed of light, forming dual particle jets firing in opposite directions. Shock waves within and along the periphery of these jets are a likely source of the bright gamma-ray emission detected by Fermi. || ", "hits": 133 }, { "id": 11215, "url": "https://svs.gsfc.nasa.gov/11215/", "result_type": "Produced Video", "release_date": "2014-02-20T11:00:00-05:00", "title": "PSR J1311-3430 'Black Widow' Pulsar Animations", "description": "The essential features of black widow binaries, and their cousins, known as redbacks, are that they place a normal but very low-mass star in close proximity to a millisecond pulsar, which has disastrous consequences for the star. Black widow systems contain stars that are both physically smaller and of much lower mass than those found in redbacks.So far, astronomers have found at least 18 black widows and nine redbacks within the Milky Way, and additional members of each class have been discovered within the dense globular star clusters that orbit our galaxy. These animations show artist's impressions of one system, named PSR J1311-3430. Discovered in 2012, J1311 sets the record for the tightest orbit of its class and contains one of the heaviest neutron stars known. The pulsar's featherweight companion, which is only a dozen or so times the mass of Jupiter and just 60 percent of its size, completes an orbit every 93 minutes – less time than it takes to watch most movies. Recent studies allow a range of values extending down to 2 solar masses for the pulsar, still among the highest-known for neutron stars. || ", "hits": 309 }, { "id": 11216, "url": "https://svs.gsfc.nasa.gov/11216/", "result_type": "Produced Video", "release_date": "2014-02-20T11:00:00-05:00", "title": "Black Widow Pulsars Consume Their Mates", "description": "Black widow spiders and their Australian cousins, known as redbacks, are notorious for an unsettling tendency to kill and devour their male partners. Astronomers have noted similar behavior among two rare breeds of binary system that contain rapidly spinning neutron stars, also known as pulsars. The essential features of black widow and redback binaries are that they place a normal but very low-mass star in close proximity to a millisecond pulsar, which has disastrous consequences for the star. Black widow systems contain stars that are both physically smaller and of much lower mass than those found in redbacks.So far, astronomers have found at least 18 black widows and nine redbacks within the Milky Way, and additional members of each class have been discovered within the dense globular star clusters that orbit our galaxy. One black widow system, named PSR J1311-3430 and discovered in 2012, sets the record for the tightest orbit of its class and contains one of the heaviest neutron stars known. The pulsar's featherweight companion, which is only a dozen or so times the mass of Jupiter and just 60 percent of its size, completes an orbit every 93 minutes – less time than it takes to watch most movies. The side of the star facing the pulsar is heated to more than 21,000 degrees Fahrenheit (nearly 12,000 C), or more than twice as hot as the sun's surface. Recent studies allow a range of values extending down to 2 solar masses for the pulsar, making it one of the most massive neutron stars known. Watch the video to learn more about this system and its discovery from some of the scientists involved. || ", "hits": 72 }, { "id": 11311, "url": "https://svs.gsfc.nasa.gov/11311/", "result_type": "Produced Video", "release_date": "2013-08-21T13:00:00-04:00", "title": "Highlights of Fermi's First Five Years", "description": "This compilation summarizes the wide range of science from the first five years of NASA's Fermi Gamma-ray Space Telescope. Fermi is a NASA observatory designed to reveal the high-energy universe in never-before-seen detail. Launched in 2008, Fermi continues to give astronomers a unique tool for exploring high-energy processes associated with solar flares, spinning neutron stars, outbursts from black holes, exploding stars, supernova remnants and energetic particles to gain insight into how the universe works. Fermi detects gamma rays, the most powerful form of light, with energies thousands to billions of times greater than the visible spectrum.The mission has discovered pulsars, proved that supernova remnants can accelerate particles to near the speed of light, monitored eruptions of black holes in distant galaxies, and found giant bubbles linked to the central black hole in our own galaxy. From blazars to thunderstorms, from dark matter to supernova remnants, catch the highlights of NASA Fermi’s first five years in space.View all the Fermi-related media from the last 5 years in the Fermi Gallery.For more information about Fermi, visit NASA's Fermi webpage. || ", "hits": 73 }, { "id": 11117, "url": "https://svs.gsfc.nasa.gov/11117/", "result_type": "Produced Video", "release_date": "2012-11-01T14:00:00-04:00", "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. || ", "hits": 132 }, { "id": 11130, "url": "https://svs.gsfc.nasa.gov/11130/", "result_type": "Produced Video", "release_date": "2012-11-01T14:00:00-04:00", "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. || ", "hits": 104 }, { "id": 10947, "url": "https://svs.gsfc.nasa.gov/10947/", "result_type": "Produced Video", "release_date": "2012-04-03T00:00:00-04:00", "title": "Crash And Burst", "description": "Imagine a dead star the size of a city and with more mass than our sun. Now imagine two of these ultra-heavy spheres smashing into each other, generating a blast bright enough to outshine an entire galaxy. Scientists have recreated just that using supercomputers to model what happens during the collision of two neutron stars. The entire process unfolds in just 35 thousandths of a second, but what this new analysis reveals is how the tangled magnetic field lines of the collapsed neutron stars restructure around a black hole, focusing a narrow stream of particles that jet into space at 99.995 percent the speed of light. Scientists believe events like this are one source of gamma-ray bursts, the powerful flashes of light from beyond the Milky Way that were first detected by satellites in the late 1960s. Watch the visualization below to see this lightning-fast cosmic wreck evolve in super-slow motion. || ", "hits": 136 }, { "id": 10858, "url": "https://svs.gsfc.nasa.gov/10858/", "result_type": "Produced Video", "release_date": "2011-11-03T14:00:00-04:00", "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. || ", "hits": 202 }, { "id": 10861, "url": "https://svs.gsfc.nasa.gov/10861/", "result_type": "Produced Video", "release_date": "2011-11-03T14:00:00-04:00", "title": "Fermi Pulsar Interactive Videos", "description": "These videos originally accompanied a Fermi Pulsar Interactive. That interactive is now available here. || ", "hits": 189 }, { "id": 10740, "url": "https://svs.gsfc.nasa.gov/10740/", "result_type": "Produced Video", "release_date": "2011-04-07T09:00:00-04:00", "title": "When Neutron Stars Collide", "description": "Armed with state-of-the-art supercomputer models, scientists have shown that colliding neutron stars can produce the energetic jet required for a gamma-ray burst. Earlier simulations demonstrated that mergers could make black holes. Others had shown that the high-speed particle jets needed to make a gamma-ray burst would continue if placed in the swirling wreckage of a recent merger. Now, the simulations reveal the middle step of the process—how the merging stars' magnetic field organizes itself into outwardly directed components capable of forming a jet. The Damiana supercomputer at Germany's Max Planck Institute for Gravitational Physics needed six weeks to reveal the details of a process that unfolds in just 35 thousandths of a second—less than the blink of an eye.For the researchers' website, with more video and stills of their simulations, go here. || ", "hits": 536 }, { "id": 10536, "url": "https://svs.gsfc.nasa.gov/10536/", "result_type": "Produced Video", "release_date": "2009-12-02T06:00:00-05:00", "title": "Suzaku: Intergalactic Prospector", "description": "Recently astronomers used the Suzaku orbiting X-ray observatory, operated jointly by NASA and the Japanese space agency, to discover the largest known reservoir of rare metals in the universe. Suzaku detected the elements chromium and manganese while observing the central region of the Perseus galaxy cluster. The metallic atoms are part of the hot gas, or \"intergalactic medium,\" that lies between galaxies. Exploding stars, or supernovas, forge the heavy elements. The supernovas also create vast outflows, called superwinds. These galactic gusts transport heavy elements into the intergalactic void. || ", "hits": 33 }, { "id": 10489, "url": "https://svs.gsfc.nasa.gov/10489/", "result_type": "Produced Video", "release_date": "2009-10-28T01:45:00-04:00", "title": "Gamma-ray Burst Photon Delay as Expected by Quantum Gravity", "description": "In this illustration, one photon (purple) carries a million times the energy of another (yellow). Some theorists predict travel delays for higher-energy photons, which interact more strongly with the proposed frothy nature of space-time. Yet Fermi data on two photons from a gamma-ray burst fail to show this effect, eliminating some approaches to a new theory of gravity. || ", "hits": 195 }, { "id": 10510, "url": "https://svs.gsfc.nasa.gov/10510/", "result_type": "Produced Video", "release_date": "2009-10-28T00:00:00-04:00", "title": "Einstein's Cosmic Speed Limit", "description": "In its first year of operations, NASA's Fermi Gamma-ray Space Telescope has mapped the entire sky with unprecedented resolution and sensitivity in gamma-rays, the highest-energy form of light. On May 10, 2009 a pair of gamma-ray photons reached Fermi only 900 milliseconds apart after traveling for 7 billion years. Fermi's measurement gives us rare experimental evidence that space-time is smooth as Einstein predicted, and has shut the door on several approaches to gravity where space-time is foamy enough to interfere strongly with light.Watch this video on the NASAexplorer YouTube channel.For complete transcript, click here. || Einsteins_Cosmic_Speed_Limit_512x288_web.png (320x180) [223.5 KB] || Einsteins_Cosmic_Speed_Limit_512x288_thm.png (80x40) [16.5 KB] || Einsteins_Cosmic_Speed_Limit_Thumbnail.jpg (346x260) [107.4 KB] || Einsteins_Cosmic_Speed_Limit_AppleTV.webmhd.webm (960x540) [82.4 MB] || Einsteins_Cosmic_Speed_Limit_AppleTV.m4v (960x540) [208.4 MB] || Einsteins_Cosmic_Speed_Limit_1280x720_H264.mov (1280x720) [433.5 MB] || Einsteins_Cosmic_Speed_Limit_1280x720_ProRes.mov (1280x720) [5.2 GB] || Einsteins_Cosmic_Speed_Limit_640x480_ipod.m4v (640x360) [68.6 MB] || Einsteins_Cosmic_Speed_Limit_512x288.mpg (512x288) [38.3 MB] || Einsteins_Cosmic_Speed_Limit_320x240.mp4 (320x180) [26.5 MB] || GSFC_20091029_EinsteinsCosmicSpeedLimit.wmv (346x236) [38.4 MB] || ", "hits": 159 }, { "id": 10407, "url": "https://svs.gsfc.nasa.gov/10407/", "result_type": "Produced Video", "release_date": "2009-04-03T14:00:00-04:00", "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. || ", "hits": 63 }, { "id": 10369, "url": "https://svs.gsfc.nasa.gov/10369/", "result_type": "Produced Video", "release_date": "2009-01-15T00:00:00-05:00", "title": "Naked-Eye Gamma-ray Burst Model for GRB 080319B", "description": "Gamma-ray bursts that are longer than two seconds are caused by the detonation of a rapidly rotating massive star at the end of its life on the main sequence. Jets of particles and gamma radiation are emitted in opposite directions from the stellar core as the star collapses. In this model, a narrow beam of gamma rays is emitted, followed by a wider beam of gamma rays. The narrow beam for GRB 080319B was aimed almost precisely at the Earth, which made it the brightest gamma-ray burst observed to date by NASA's Swift satellite. || ", "hits": 94 }, { "id": 10361, "url": "https://svs.gsfc.nasa.gov/10361/", "result_type": "Produced Video", "release_date": "2009-01-09T10:00:00-05:00", "title": "Pulsars Emit Gamma-rays from Equator", "description": "A pulsar is a rapidly spinning and highly magnetized neutron star, the crushed core left behind when a massive sun explodes. Most were found through their pulses at radio wavelengths, which are thought to be caused by narrow, lighthouse-like beams emanating from the star's magnetic poles. When it comes to gamma-rays, pulsars are no longer lighthouses. A new class of gamma-ray-only pulsars shows that the gamma rays must form in a broader region than the lighthouse-like radio beam. Astronomers now believe the pulsed gamma rays arise far above the neutron star. || ", "hits": 103 } ] }