Watch this video on the NASA Goddard YouTube channel.
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The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 296432, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460601, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_ProRes_1280x720_29.97.mov", "filename": "ISON_Full_ProRes_1280x720_29.97.mov", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. 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The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 296433, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460599, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_H264_Best_1280x720_29.97.mov", "filename": "ISON_Full_H264_Best_1280x720_29.97.mov", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. 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The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 296434, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460602, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_H264_Good_1280x720_29.97.mov", "filename": "ISON_Full_H264_Good_1280x720_29.97.mov", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. 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The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. 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The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 296437, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460606, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_FINAL_appletv.m4v", "filename": "ISON_Full_FINAL_appletv.m4v", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. 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The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 960, "height": 540, "pixels": 518400 } }, { "id": 296438, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460597, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_H264_1280x720_30.mov", "filename": "ISON_Full_H264_1280x720_30.mov", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. 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The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 296445, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460610, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_FINAL_appletv.webmhd.webm", "filename": "ISON_Full_FINAL_appletv.webmhd.webm", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 960, "height": 540, "pixels": 518400 } }, { "id": 296440, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460604, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_FINAL_ipod_lg.m4v", "filename": "ISON_Full_FINAL_ipod_lg.m4v", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 640, "height": 360, "pixels": 230400 } }, { "id": 296441, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460608, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Full_FINAL.mp4", "filename": "ISON_Full_FINAL.mp4", "media_type": "Movie", "alt_text": "After several days of continued observations, scientists continue to work to determine and to understand the fate of Comet ISON: There's no doubt that the comet shrank in size considerably as it rounded the sun and there's no doubt that something made it out on the other side to shoot back into space. The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. 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The question remains as to whether the bright spot seen moving away from the sun was simply debris, or whether a small nucleus of the original ball of ice was still there. Regardless, it is likely that it is now only dust. The comet was visible in instruments on NASA's Solar Terrestrial Relations Observatory, or STEREO, and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, via images called coronagraphs.Watch this video on the NASA Goddard YouTube channel.Credit:NASA/STEREO/ESA/SOHO/SDOGSFC", "width": 320, "height": 240, "pixels": 76800 } } ], "extra_data": {} }, { "id": 342290, "url": "https://svs.gsfc.nasa.gov/11422/#media_group_342290", "widget": "Single image", "title": "", "caption": "", "description": "\"Timelapse\" series of images of comet ISON as viewed by ESA/NASA's Solar and Heliospheric Observatory, or SOHO. This image is a composite, with the sun imaged by NASA's Solar Dynamics Observatory in the center, and SOHO's two coronagraphs showing the solar atmosphere, the corona. The most recent image in this is from 6:30 a.m. EST on Dec. 1, 2013.
Image Credit:ESA&NASA/SOHO/SDO", "items": [ { "id": 296447, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460612, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/SOHO_C2-C3_timelapse_complete.jpg", "filename": "SOHO_C2-C3_timelapse_complete.jpg", "media_type": "Image", "alt_text": "\"Timelapse\" series of images of comet ISON as viewed by ESA/NASA's Solar and Heliospheric Observatory, or SOHO. This image is a composite, with the sun imaged by NASA's Solar Dynamics Observatory in the center, and SOHO's two coronagraphs showing the solar atmosphere, the corona. The most recent image in this is from 6:30 a.m. EST on Dec. 1, 2013.Image Credit:ESA&NASA/SOHO/SDO", "width": 1024, "height": 1024, "pixels": 1048576 } }, { "id": 296448, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460611, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/SOHO_C2-C3_timelapse_complete_web.png", "filename": "SOHO_C2-C3_timelapse_complete_web.png", "media_type": "Image", "alt_text": "\"Timelapse\" series of images of comet ISON as viewed by ESA/NASA's Solar and Heliospheric Observatory, or SOHO. This image is a composite, with the sun imaged by NASA's Solar Dynamics Observatory in the center, and SOHO's two coronagraphs showing the solar atmosphere, the corona. The most recent image in this is from 6:30 a.m. EST on Dec. 1, 2013.Image Credit:ESA&NASA/SOHO/SDO", "width": 320, "height": 320, "pixels": 102400 } }, { "id": 296446, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460613, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/SOHO_C2-C3_timelapse_complete.tif", "filename": "SOHO_C2-C3_timelapse_complete.tif", "media_type": "Image", "alt_text": "\"Timelapse\" series of images of comet ISON as viewed by ESA/NASA's Solar and Heliospheric Observatory, or SOHO. This image is a composite, with the sun imaged by NASA's Solar Dynamics Observatory in the center, and SOHO's two coronagraphs showing the solar atmosphere, the corona. The most recent image in this is from 6:30 a.m. EST on Dec. 1, 2013.Image Credit:ESA&NASA/SOHO/SDO", "width": 2048, "height": 2048, "pixels": 4194304 } } ], "extra_data": {} }, { "id": 342291, "url": "https://svs.gsfc.nasa.gov/11422/#media_group_342291", "widget": "Single image", "title": "", "caption": "", "description": "Comet ISON swoops around the sun and through Scorpius. This composite merges an SDO AIA 171 sun image (Nov. 28, 2214 UT), SOHO C2 (2036 UT) and C3 (2030 UT) images, and a Digitized Sky Survey view of the sky in northern Scorpius.
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Watch this video on the NASA Goddard YouTube channel.
Credit: NASA/STEREO/ESA/SOHO/GSFC", "items": [ { "id": 296470, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460634, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/ISON_Fizzle_Still.jpg", "filename": "ISON_Fizzle_Still.jpg", "media_type": "Image", "alt_text": "These images from NASA's Solar Terrestrial Relations Observatory and the ESA/NASA Solar and Heliospheric Observatory show Comet ISON growing dim as it made the journey around the sun. The comet is believed to have broken up and evaporated. 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Image Credit:
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Watch this video on the NASAgovVideo YouTube channel.
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Note: the STEREO-A spacecraft is currently located on the other side of the Sun, so it sees a totally different geometry to what we see from Earth.Credit: Karl Battams/NASA/STEREO/CIOC", "width": 534, "height": 456, "pixels": 243504 } }, { "id": 296521, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 460688, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011422/encke_ison_crop_srem_lr_ProRes.mov", "filename": "encke_ison_crop_srem_lr_ProRes.mov", "media_type": "Movie", "alt_text": "Comet ISON makes its appearance into the higher-resolution HI-1 camera on the STEREO-A spacecraft. The dark \"clouds\" coming from the right are density enhancements in the solar wind, causing all the ripples in comet Encke's tail. These kinds of solar wind interactions give us valuable information about solar wind conditions near the sun. 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Note: the STEREO-A spacecraft is currently located on the other side of the Sun, so it sees a totally different geometry to what we see from Earth.Credit: Karl Battams/NASA/STEREO/CIOC", "width": 534, "height": 456, "pixels": 243504 } } ], "extra_data": {} }, { "id": 342308, "url": "https://svs.gsfc.nasa.gov/11422/#media_group_342308", "widget": "Basic text", "title": "For More Information", "caption": "", "description": "See the following sources:\n\n* [http://www.nasa.gov/content/goddard/nasas-stereo-shows-comet-ison-approaching-the-sun/](http://www.nasa.gov/content/goddard/nasas-stereo-shows-comet-ison-approaching-the-sun/)\n* [http://www.nasa.gov/content/nasa-releases-comet-ison-images-from-stereo/](http://www.nasa.gov/content/nasa-releases-comet-ison-images-from-stereo/)\n* [http://www.nasa.gov/mission_pages/sunearth/index.html](http://www.nasa.gov/mission_pages/sunearth/index.html)", "items": [], "extra_data": {} } ], "studio": "gms", "funding_sources": [ "NASA Heliophysics" ], "credits": [ { "role": "Video editor", "people": [ { "name": "Scott Wiessinger", "employer": "USRA" } ] }, { "role": "Producer", "people": [ { "name": "Scott Wiessinger", "employer": "USRA" } ] }, { "role": "Scientist", "people": [ { "name": "Karl Battams", "employer": "Naval Research Laboratory" } ] }, { "role": "Writer", "people": [ { "name": "Karen Fox", "employer": "ADNET Systems, Inc." } ] } ], "missions": [ "STEREO" ], "series": [], "tapes": [], "papers": [], "datasets": [], "nasa_science_categories": [ "Sun" ], "keywords": [ "Comet", "Comet ISON", "HDTV", "Heliophysics", "STEREO" ], "recommended_pages": [], "related": [ { "id": 11416, "url": "https://svs.gsfc.nasa.gov/11416/", "page_type": "Produced Video", "title": "Death Of A Comet", "description": "Comet ISON was born along with the solar system some 4.5 billion years ago. But after a close encounter with the sun, its time has finally come to an end. On November 28, 2013, the comet shot around the sun on a dangerous trajectory that brought it within 700,000 miles of the surface. As it disappeared from view of sun-observing spacecraft, scientists waited with bated breath to learn of its fate. Would the comet disintegrate in the fierce heat and gravity of the sun or remain intact? Some remnant of the comet did indeed survive the trip around the sun, but it quickly dimmed and fizzled, signaling a close to ISON's magnificent journey through space. Watch the video for a look at Comet ISON’s final moments. || ", "release_date": "2013-12-26T00:00:00-05:00", "update_date": "2023-05-03T13:51:20.459744-04:00", "main_image": { "id": 459671, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011416/cover-1024.jpg", "filename": "cover-1024.jpg", "media_type": "Image", "alt_text": "A close encounter with the sun seals Comet ISON's fate.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 11434, "url": "https://svs.gsfc.nasa.gov/11434/", "page_type": "Produced Video", "title": "Comet ISON before and during Perihelion", "description": "After a year of observations, scientists waited with bated breath on Nov. 28, 2013, as Comet ISON made its closest approach to the sun, known as perihelion. Would the comet disintegrate in the fierce heat and gravity of the sun? Or survive intact to appear as a bright comet in the pre-dawn sky? Some remnant of ISON did indeed make it around the sun, but it quickly dimmed and fizzled as seen with NASA's solar observatories. This does not mean scientists were disappointed, however. On Dec. 10, 2013, researchers presented science results from the comet's last days at the 2013 Fall American Geophysical Union meeting in San Francisco, Calif. They described how this unique comet lost mass in advance of reaching perihelion and most likely broke up during its closest approach, as well, as summarized what this means for determining what the comet was made of. The panel shared results from the Solar and Heliospheric Observatory (SOHO), the Solar Terrestrial Relations Observatory (STEREO), the Mars Reconnaissance Orbiter (MRO) and MESSENGER to present a picture of ISON's trip around the sun, which appears to have led to its demise. The panel also reported on why ISON was not seen in images from the Solar Dynamics Observatory (SDO). || ", "release_date": "2013-12-10T13:00:00-05:00", "update_date": "2023-05-03T13:51:21.952329-04:00", "main_image": { "id": 460135, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011434/MESSENGERgrid_web_searchweb.png", "filename": "MESSENGERgrid_web_searchweb.png", "media_type": "Image", "alt_text": "MESSENGER's narrow-angle camera series-of-stills has potential to reveal outburst from ISON in action.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 11307, "url": "https://svs.gsfc.nasa.gov/11307/", "page_type": "Produced Video", "title": "What is a Sungrazing Comet?", "description": "Sungrazing comets are a special class of comets that come very close to the sun at their nearest approach, a point called perihelion. To be considered a sungrazer, a comet needs to get within about 850,000 miles from the sun at perihelion. Many come even closer, even to within a few thousand miles. Being so close to the sun is very hard on comets for many reasons. They are subjected to a lot of solar radiation which boils off their water or other volatiles. The physical push of the radiation and the solar wind also helps form the tails. And as they get closer to the sun, the comets experience extremely strong tidal forces, or gravitational stress. In this hostile environment, many sungrazers do not survive their trip around the sun. Although they don't actually crash into the solar surface, the sun is able to destroy them anyway. Many sungrazing comets follow a similar orbit, called the Kreutz Path, and collectively belong to a population called the Kreutz Group. In fact, close to 85% of the sungrazers seen by the SOHO satellite are on this orbital highway. Scientists think one extremely large sungrazing comet broke up hundreds, or even thousands, of years ago, and the current comets on the Kreutz Path are the leftover fragments of it. As clumps of remnants make their way back around the sun, we experience a sharp increase in sungrazing comets, which appears to be going on now. Comet Lovejoy, which reached perihelion on December 15, 2011 is the best known recent Kreutz-group sungrazer. And so far, it is the only one that NASA's solar-observing fleet has seen survive its trip around the sun. Comet ISON, an upcoming sungrazer with a perihelion of 730,000 miles on November 28, 2013, is not on the Kreutz Path. In fact, ISON's orbit suggests that it may gain enough momentum to escape the solar system entirely, and never return. Before it does so, it will pass within about 40 million miles from Earth on December 26th. Assuming it survives its trip around the sun. || ", "release_date": "2013-07-16T13:00:00-04:00", "update_date": "2023-05-03T13:52:00.158074-04:00", "main_image": { "id": 463840, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011300/a011307/Sungrazer_Still.png", "filename": "Sungrazer_Still.png", "media_type": "Image", "alt_text": "Short, narrated video about sungrazing comets.Watch this video on the NASAexplorer YouTube channel.For complete transcript, click here.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 11222, "url": "https://svs.gsfc.nasa.gov/11222/", "page_type": "Produced Video", "title": "The Path of Comet ISON", "description": "Comet C/2012 S1, better known as comet ISON, may become a dazzling sight as it traverses the inner solar system in late 2013. During the weeks before its Nov. 28 close approach to the sun, the comet will be observable with small telescopes, and binoculars. Observatories around the world and in space will track the comet during its fiery trek around the sun. If ISON survives its searing solar passage, which seems likely but is not certain, the comet may be visible to the unaided eye in the pre-dawn sky during December.Watch the animations on this page to visualize ISON's voyage through the inner solar system, or build the paper model of its orbit to track the changing positions of Earth and the comet.Like all comets, ISON is a clump of frozen gases mixed with dust. Often described as \"dirty snowballs,\" comets emit gas and dust whenever they venture near enough to the sun that the icy material transforms from a solid to gas, a process called sublimation. Jets powered by sublimating ice also release dust, which reflects sunlight and brightens the comet. On Nov. 28, ISON will make a sweltering passage around the sun. The comet will approach within about 730,000 miles (1.2 million km) of its visible surface, which classifies ISON as a sungrazing comet. In late November, its icy material will furiously sublimate and release torrents of dust as the surface erodes under the sun's fierce heat, all as sun-monitoring satellites look on. Around this time, the comet may become bright enough to glimpse just by holding up a hand to block the sun's glare.Sungrazing comets often shed large fragments or even completely disrupt following close encounters with the sun, but for ISON neither fate is a forgone conclusion.Following ISON's solar swingby, the comet will depart the sun and move toward Earth, appearing in morning twilight through December. The comet will swing past Earth on Dec. 26, approaching within 39.9 million miles (64.2 million km) or about 167 times farther than the moon.The comet was discovered on Sept 21, 2012, by Russian astronomers Vitali Nevski and Artyom Novichonok using a telescope of the International Scientific Optical Network (ISON) located near Kislovodsk.Learn more about sungrazing comets. || ", "release_date": "2013-03-29T11:00:00-04:00", "update_date": "2025-01-05T00:17:07.797970-05:00", "main_image": { "id": 467495, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011222/Instruction_still.png", "filename": "Instruction_still.png", "media_type": "Image", "alt_text": "This paper model illustrates the comet's path during its six-month trek in the vicinity of Earth, Venus and Mercury. Track how the relationship between Earth and the comet constantly changes by referring to the dates along both orbits.Download the pdf with instructions here.", "width": 934, "height": 602, "pixels": 562268 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }