{ "count": 17, "next": null, "previous": null, "results": [ { "id": 40548, "url": "https://svs.gsfc.nasa.gov/gallery/solarand-heliospheric-observatory-soho/", "result_type": "Gallery", "release_date": "2026-03-03T00:00:00-05:00", "title": "Solar and Heliospheric Observatory (SOHO)", "description": "Launched in December 1995, the joint ESA-NASA Solar and Heliospheric Observatory mission (SOHO), was designed to study the Sun inside out. Though its mission was scheduled to run until only 1998, it has continued collecting data, adding to scientists' understanding of our closest star, and making many new discoveries, including more than 5,000 comets.\n\nLearn more: https://science.nasa.gov/mission/soho/", "hits": 762 }, { "id": 14552, "url": "https://svs.gsfc.nasa.gov/14552/", "result_type": "Produced Video", "release_date": "2024-03-27T10:00:00-04:00", "title": "Volunteers Help ESA & NASA Mission to Discover 5,000 Comets", "description": "The Solar and Heliospheric Observatory (SOHO), a joint mission of ESA (European Space Agency) and NASA, has discovered its 5,000th comet, thanks to the help of volunteer comet hunters participating in the NASA-funded Sungrazer Project.The sungrazing comet was spotted in SOHO images on March 25, 2024, by Hanjie Tan in the Czech Republic, who has participated in the Sungrazer Project since he was 13 years old. The comet is small and has a short orbital period around the Sun. It belongs to the “Marsden group” of comets, which are thought to be related to the larger comet 96P/Machholz. The group is named after the late scientist Brian Marsden, who first recognized the group using SOHO observations.To learn more about the discovery and SOHO, visit: https://science.nasa.gov/science-research/heliophysics/esa-nasa-solar-observatory-discovers-its-5000th-comet/Since the early 2000s, the Sungrazer Project has allowed anyone with a computer to search for comets in images taken by the SOHO spacecraft.To learn more about the Sungrazer Project, visit: https://science.nasa.gov/citizen-science/the-sungrazer-project/ || ", "hits": 85 }, { "id": 13623, "url": "https://svs.gsfc.nasa.gov/13623/", "result_type": "Produced Video", "release_date": "2020-06-17T10:00:00-04:00", "title": "Four of Our Favorite SOHO-discovered Comets", "description": "Karl Battams, manager of NASA's citizen science Sungrazer Project, talks about his four favorite comets that SOHO has observed.Music: \"Inducing Waves\" from Universal Production MusicWatch this video on the NASA Goddard YouTube channel.Complete transcript available. || 13623_SOHO4FavoriteComets_ProRes_1920x1080_2997.01026_print.jpg (1024x576) [155.4 KB] || 13623_SOHO4FavoriteComets_ProRes_1920x1080_2997.01026_searchweb.png (320x180) [72.1 KB] || 13623_SOHO4FavoriteComets_ProRes_1920x1080_2997.01026_thm.png (80x40) [5.3 KB] || 13623_SOHO4FavoriteComets_ProRes_1920x1080_2997.mov (1920x1080) [3.1 GB] || 13623_SOHO4FavoriteComets_1080.mp4 (1920x1080) [245.9 MB] || 13623_SOHO4FavoriteComets_Good_1080.mp4 (1920x1080) [128.8 MB] || 13623_SOHO4FavoriteComets_1080.webm (1920x1080) [27.2 MB] || SOHO_4000Comets_SRT_Captions.en_US.srt [4.8 KB] || SOHO_4000Comets_SRT_Captions.en_US.vtt [4.8 KB] || ", "hits": 76 }, { "id": 13622, "url": "https://svs.gsfc.nasa.gov/13622/", "result_type": "Produced Video", "release_date": "2020-05-19T10:00:00-04:00", "title": "Counting Comets", "description": "Music Credit: Birds in The Rain by Robert GuerrierComplete transcript available.Watch this video on the NASA Goddard YouTube channel. || cometthumb.jpg (1920x1080) [404.7 KB] || cometthumb_print.jpg (1024x576) [192.3 KB] || cometthumb_searchweb.png (320x180) [56.6 KB] || cometthumb_web.png (320x180) [56.6 KB] || cometthumb_thm.png (80x40) [5.1 KB] || 13622.Counting_Comets.Mobile720.mp4 (1280x720) [108.5 MB] || 13622.Counting_Comets.Twitter1080.mp4 (1920x1080) [40.1 MB] || 13622.Counting_CometsFB.mp4 (1920x1080) [215.9 MB] || 13622.Counting_Comets.YouTube1080.mp4 (1920x1080) [284.3 MB] || 13622.Counting_Comets.YouTube1080.webm (1920x1080) [20.2 MB] || Counting_CometsAPR.mov (1920x1080) [4.4 GB] || 13622Comets.en_US.srt [3.6 KB] || 13622Comets.en_US.vtt [3.7 KB] || ", "hits": 151 }, { "id": 12292, "url": "https://svs.gsfc.nasa.gov/12292/", "result_type": "Produced Video", "release_date": "2016-06-24T15:00:00-04:00", "title": "Solar Highlights of 2016/2017", "description": "A collection of solar highlights featuring:- NASA's Solar Dynamics Observatory (SDO)- NASA's Interface Region Imaging Spectrograph (IRIS) mission- ESA/NASA's Solar and Heliospheric Observatory (SOHO)- NASA's Solar TErrestrial RElations Observatory (STEREO) mission || ", "hits": 118 }, { "id": 4342, "url": "https://svs.gsfc.nasa.gov/4342/", "result_type": "Visualization", "release_date": "2015-09-15T10:00:00-04:00", "title": "Sixteen Comets Touring the Inner Solar System", "description": "This visualization presents a small sample of the 9 years of comets seen by SOHO from the perspective a an observer at a fixed point above the ecliptic plane with the Sun at the center. || SixteenComets-oblique.slate_HAEmove.HD1080i.1000_print.jpg (1024x576) [109.1 KB] || SixteenComets-oblique.slate_HAEmove.HD1080i.1000_searchweb.png (320x180) [72.2 KB] || SixteenComets-oblique.slate_HAEmove.HD1080i.1000_thm.png (80x40) [4.3 KB] || SixteenComets-oblique.HD1080.webm (1920x1080) [11.3 MB] || SixteenComets-oblique.HD1080.mov (1920x1080) [109.2 MB] || Oblique (1920x1080) [512.0 KB] || SixteenComets-oblique_1080p30.mp4 (1920x1080) [64.2 MB] || ", "hits": 60 }, { "id": 4343, "url": "https://svs.gsfc.nasa.gov/4343/", "result_type": "Visualization", "release_date": "2015-09-15T10:00:00-04:00", "title": "Lots of Comets - Long trail version", "description": "This visualization presents 14 years of comets seen by SOHO from the perspective of an observer orbiting a fixed point above the ecliptic plane with the Sun at the center.This video is also available on our YouTube channel. || LotsaComets-orbit.slate_HAEmove.HD1080i.1000_print.jpg (1024x576) [110.2 KB] || LotsaComets-orbit.slate_HAEmove.HD1080i.1000_searchweb.png (320x180) [71.5 KB] || LotsaComets-orbit.slate_HAEmove.HD1080i.1000_thm.png (80x40) [4.7 KB] || Orbit (1920x1080) [512.0 KB] || LotsaComets-orbit_1080p30.mp4 (1920x1080) [188.3 MB] || LotsaComets-orbit_1080p30.webm (1920x1080) [20.8 MB] || ", "hits": 42 }, { "id": 4344, "url": "https://svs.gsfc.nasa.gov/4344/", "result_type": "Visualization", "release_date": "2015-09-15T10:00:00-04:00", "title": "Lots of Comets - Short trail version", "description": "This visualization presents 14 years of comets seen by SOHO from the perspective of an observer at a fixed point above the ecliptic plane with the Sun at the center. || LotsaCometsST-oblique.slate_HAEmove.HD1080i.1000_print.jpg (1024x576) [97.7 KB] || LotsaCometsST-oblique.slate_HAEmove.HD1080i.1000_searchweb.png (320x180) [65.2 KB] || LotsaCometsST-oblique.slate_HAEmove.HD1080i.1000_thm.png (80x40) [3.5 KB] || Oblique (1920x1080) [768.0 KB] || LotsaCometsST-oblique_1080p30.mp4 (1920x1080) [103.6 MB] || LotsaCometsST-oblique_1080p30.webm (1920x1080) [20.3 MB] || ", "hits": 39 }, { "id": 11975, "url": "https://svs.gsfc.nasa.gov/11975/", "result_type": "Produced Video", "release_date": "2015-09-15T10:00:00-04:00", "title": "3,000 Comets for SOHO", "description": "Karl Battams of the Naval Research Lab talks us through a visualization of the comets that SOHO has witnessed.Watch this video on the NASAexplorer YouTube channel. || sohocometsthumb.jpg (1280x720) [150.9 KB] || sohocometsthumb_print.jpg (1024x576) [157.3 KB] || sohocometsthumb_searchweb.png (320x180) [82.6 KB] || sohocometsthumb_web.png (320x180) [82.6 KB] || sohocometsthumb_thm.png (80x40) [11.5 KB] || G2015-069_3000SOHOcometsV2-H264_Good_1080_29.97.mov (1920x1080) [565.6 MB] || G2015-069_3000SOHOcometsV2-H264_Best_1920x1080_59.94.mov (1920x1080) [3.3 GB] || VX-71391.m4v (1280x720) [134.5 MB] || VX-71391.mov (1920x1080) [2.1 GB] || VX-71391.webm (960x540) [108.0 MB] || 3000SOHOcometsV2.en_US.srt [4.5 KB] || 3000SOHOcometsV2.en_US.vtt [4.5 KB] || VX-71391.mp4 (480x272) [35.9 MB] || ", "hits": 51 }, { "id": 40157, "url": "https://svs.gsfc.nasa.gov/gallery/other-sungrazing-comets/", "result_type": "Gallery", "release_date": "2013-11-20T00:00:00-05:00", "title": "Other Sungrazing Comets", "description": "No description available.", "hits": 3 }, { "id": 40158, "url": "https://svs.gsfc.nasa.gov/gallery/comet-ison/", "result_type": "Gallery", "release_date": "2013-11-20T00:00:00-05:00", "title": "Comet ISON", "description": "Catalogued as C/2012 S1, Comet ISON was first spotted 585 million miles away in September 2012. This is ISON's very first trip into the inner solar system. That means it is still made of pristine matter from the earliest days of the solar system’s formation, its top layers never having been lost by a trip near the sun. Along Comet ISON's journey, NASA has used a vast fleet of spacecraft and Earth-based telescopes to learn more about this time capsule from when the solar system first formed.During the last week of its inbound trip, ISON will enter the fields of view of NASA’s space-based solar observatories. Comet ISON will be viewed first by NASA's Solar Terrestrial Relations Observatory, or STEREO. Next the comet will be seen in what’s called coronagraphs by both STEREO and the joint European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO. Then, NASA’s Solar Dynamics Observatory will view the comet for a few hours during its closest approach to the sun, known as perihelion.", "hits": 230 }, { "id": 11307, "url": "https://svs.gsfc.nasa.gov/11307/", "result_type": "Produced Video", "release_date": "2013-07-16T13:00:00-04:00", "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. || ", "hits": 246 }, { "id": 11222, "url": "https://svs.gsfc.nasa.gov/11222/", "result_type": "Produced Video", "release_date": "2013-03-29T11:00:00-04:00", "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. || ", "hits": 103 }, { "id": 11145, "url": "https://svs.gsfc.nasa.gov/11145/", "result_type": "Produced Video", "release_date": "2013-02-06T10:00:00-05:00", "title": "Counting Comets", "description": "As comets orbit the sun, many come too close and evaporate completely. Others survive the journey, but their orbits gradually move closer to the sun. Ultimately, the heat of the solar atmosphere melts the ice that binds a comet together and breaks it apart into smaller bodies that follow similar orbits. These are the sungrazers, and scientists and amateur astronomers are seeing more of them than ever. As of 1979, we only knew of a dozen. Nearing the end of 2012, thanks to better observation tools, we have now seen 3,000. The bulk of the sungrazers are known as Kreutz comets, and are likely derived from a single original comet observed as early as 371 AD. Watch the videos to learn more about and see NASA satellite footage of sungrazing comets. || ", "hits": 57 }, { "id": 11156, "url": "https://svs.gsfc.nasa.gov/11156/", "result_type": "Produced Video", "release_date": "2013-02-06T10:00:00-05:00", "title": "Sungrazers Galore", "description": "Before 1979, there were less than a dozen known sungrazing comets. As of December 2012, we know of 2,500. Why did this number increase? With solar observatories like SOHO, STEREO, and SDO, we have not only better means of viewing the sun, but also the comets that approach it. SOHO allows us to see smaller, fainter comets closer to the sun than we have ever been able to see before. Even though many of these comets do not survive their journey past the sun, they survive long enough to be observed, and be added to our record of sungrazing comets. || ", "hits": 59 }, { "id": 4018, "url": "https://svs.gsfc.nasa.gov/4018/", "result_type": "Visualization", "release_date": "2012-12-10T00:00:00-05:00", "title": "Kreutz Comet Orbits", "description": "HD movie of representative orbit of a sungrazing comet. || Kreutz.noslate_HEEmove.HD1080i.0350.jpg (1920x1080) [582.0 KB] || Kreutz.noslate_HEEmove.HD1080i.0350_web.png (320x180) [92.0 KB] || Kreutz.noslate_HEEmove.HD1080i.0350_thm.png (80x40) [4.5 KB] || Kreutz-Lovejoy_HD1080.mov (1920x1080) [13.2 MB] || Kreutz-Lovejoy_HD1080.mp4 (1920x1080) [13.2 MB] || 1920x1080_16x9_30p (1920x1080) [64.0 KB] || Kreutz-Lovejoy_HD1080.webmhd.webm (960x540) [2.9 MB] || Kreutz-Lovejoy_iPod.m4v (640x360) [3.0 MB] || ", "hits": 58 }, { "id": 11158, "url": "https://svs.gsfc.nasa.gov/11158/", "result_type": "Produced Video", "release_date": "2012-12-04T15:00:00-05:00", "title": "Sun Grazing Comets as Solar Probes", "description": "To observe how winds move high in Earth's atmosphere, scientists sometimes release clouds of barium as tracers to track how the material corkscrews and sweeps around — but scientists have no similar technique to study the turbulent atmosphere of the sun. So researchers were excited in December 2011, when Comet Lovejoy swept right through the sun's corona with its long tail streaming behind it. NASA's Solar Dynamics Observatory (SDO) captured images of the comet, showing how its long tail was buffeted by systems around the sun, offering scientists a unique way of observing movement as if they'd orchestrated the experiment themselves. Since comet tails have ionized gases, they are also affected by the sun's magnetic field, and can act as tracers of the complex magnetic system higher up in the atmosphere. Comets can also aid in the study of coronal mass ejections and the solar wind.Watch this video on YouTube. || ", "hits": 89 } ] }