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"description": "A solar eclipse occurs when the Moon's shadow falls on the Earth. The shadow comprises two concentric cones called the umbra and the penumbra. Within the smaller, central umbra, the Sun is completely blocked by the Moon, and anyone inside the umbra sees a total eclipse. Within the larger penumbra, the Sun is only partially blocked.
In this animation, the umbra and penumbra cones are viewed through a telescopic lens on a virtual camera located far behind the Moon. Long focal lengths like the one used here appear to compress the distance between near and far objects. Despite appearances, the geometry of the scene is correct. The Earth is roughly 112 lunar diameters beyond the Moon, and the angle at the apex of the umbral cone is only about half a degree.
From this point of view directly behind the Moon, the edges of the shadow cones look circular. The edge of the penumbra is outlined in yellow. It passes over all of North and Central America and the Amazon basin, as well as Greenland and the North Pole. Everyone there will see at least a partial eclipse. The path of the umbra (the small black dot) crosses the United States from Oregon to South Carolina.",
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"page_type": "Produced Video",
"title": "Historic Solar Eclipse Just Days Away Live Shots (8.16.17). Are You Ready?",
"description": "For more about finding safe viewing glasses. || ",
"release_date": "2017-08-22T00:00:00-04:00",
"update_date": "2017-07-27T09:58:47.215456-04:00",
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"title": "The Moon's Role in a Solar Eclipse",
"description": "This video explains how our moon creates a solar eclipse, why it's such a rare event to see, and how data from NASA's Lunar Reconnaissance Orbiter has enhanced our ability to map an eclipse's path of totality.Music Provided by Universal Production Music: “Bring Me Up” – Anders Gunnar Kampe & Henrik Lars Wikstrom.Watch this video on the NASA.gov Video YouTube channel. || MoonsRoleEclipseThumnail_print.jpg (1024x576) [40.9 KB] || LROSolarEclipse_Thumbnail.jpg (1080x1920) [491.4 KB] || MoonsRoleEclipseThumnail_searchweb.png (320x180) [34.1 KB] || MoonsRoleEclipseThumnail_thm.png (80x40) [4.4 KB] || 12648_MoonsRoleInASolarEclipse_Facebook.webm (1280x720) [21.0 MB] || MoonsRoleEclipseThumnail.tif (1920x1080) [7.9 MB] || 12648_MoonsRoleInASolarEclipse_Facebook.mp4 (1280x720) [219.1 MB] || 12648_MoonsRoleInASolarEclipse_YOUTUBE_1080.mp4 (1920x1080) [296.7 MB] || 12648_MoonsRoleInASolarEclipse_Captions.en_US.srt [3.7 KB] || 12648_MoonsRoleInASolarEclipse_Captions.en_US.vtt [3.7 KB] || 12648_MoonsRoleInASolarEclipse_MASTER.mov (1920x1080) [4.1 GB] || ",
"release_date": "2017-07-21T10:00:00-04:00",
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"alt_text": "This video explains how our moon creates a solar eclipse, why it's such a rare event to see, and how data from NASA's Lunar Reconnaissance Orbiter has enhanced our ability to map an eclipse's path of totality.Music Provided by Universal Production Music: “Bring Me Up” – Anders Gunnar Kampe & Henrik Lars Wikstrom.Watch this video on the NASA.gov Video YouTube channel.",
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{
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"page_type": "Visualization",
"title": "Flying Around The Eclipse Shadow",
"description": "A view of the Moon's shadow during the August 21, 2017 eclipse from both the night and day sides of the Earth. || night_to_day.0300_print.jpg (1024x576) [47.6 KB] || night_to_day.0300_searchweb.png (320x180) [28.2 KB] || night_to_day.0300_thm.png (80x40) [3.2 KB] || eclipse_flyaround_1080p30.mp4 (1920x1080) [36.2 MB] || eclipse_flyaround_720p30.mp4 (1280x720) [12.7 MB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || eclipse_flyaround_720p30.webm (1280x720) [5.4 MB] || eclipse_flyaround_720p30.wmv (1280x720) [42.8 MB] || FlyingAroundTheEclipseShadow.mov (1280x720) [682.8 MB] || eclipse_flyaround_360p30.mp4 (640x360) [4.3 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || eclipse_flyaround_2160p30.mp4 (3840x2160) [122.4 MB] || FlyingAroundTheEclipseShadow4k.mov (3840x2160) [2.4 GB] || eclipse_flyaround_1080p30.mp4.hwshow [222 bytes] || ",
"release_date": "2017-06-21T05:00:00-04:00",
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"alt_text": "A view of the Moon's shadow during the August 21, 2017 eclipse from both the night and day sides of the Earth.",
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"page_type": "Produced Video",
"title": "What determines when we have an eclipse?",
"description": "Music: Witch Waltz by Dorian KellyComplete transcript available.Watch this video on the NASA Goddard YouTube channel. || EclipsePlane_V7.00001_print.jpg (1024x576) [79.6 KB] || EclipsePlane_V7.00001_searchweb.png (320x180) [62.0 KB] || EclipsePlane_V7.00001_thm.png (80x40) [3.8 KB] || EclipsePlane_V7.mp4 (1920x1080) [63.0 MB] || EclipsePlane_V7_1.mp4 (1920x1080) [91.4 MB] || EclipsePlane_V7.webm (1920x1080) [5.7 MB] || EclipsePlane_V7.en_US.srt [499 bytes] || EclipsePlane_V7.en_US.vtt [511 bytes] || EclipsePlane_V7.mov (1920x1080) [1.6 GB] || ",
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"alt_text": "Music: Witch Waltz by Dorian KellyComplete transcript available.Watch this video on the NASA Goddard YouTube channel.",
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"url": "https://svs.gsfc.nasa.gov/12625/",
"page_type": "Produced Video",
"title": "Rare Total Solar Eclipse Is Only Two Months Away Live Shots 6.21.17",
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"release_date": "2017-06-13T14:00:00-04:00",
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{
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"url": "https://svs.gsfc.nasa.gov/12412/",
"page_type": "Produced Video",
"title": "Tracing the 2017 Solar Eclipse",
"description": "When depicting an eclipse path, data visualizers have usually chosen to represent the moon's shadow as an oval. By bringing in a variety of NASA data sets, visualizer Ernie Wright has created a new and more accurate representation of the eclipse. For the first time, we are able to see that the moon's shadow is better represented as a polygon. This more complicated shape is based NASA's Lunar Reconnaissance Orbiter's view of the mountains and valleys that form the moon's jagged edge. By combining moon's terrain, heights of land forms on Earth, and the angle of the sun, Wright is able to show the eclipse path with the greatest accuracy to date. || ",
"release_date": "2016-12-14T12:00:00-05:00",
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"alt_text": "Hear data visualizer Ernie Wright discuss the map in the video above. To see the maps unedited, watch the two videos below.Music credit: Life Choices by Eric ChevalierComplete transcript available.Watch this video on the NASA Goddard YouTube channel.",
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"id": 4466,
"url": "https://svs.gsfc.nasa.gov/4466/",
"page_type": "Visualization",
"title": "Insolation during the 2017 Eclipse",
"description": "Insolation (the amount of sunlight reaching the ground) is affected dramatically by the Moon's shadow during the August 21, 2017 total solar eclipse. || usa_insol.0720_print.jpg (1024x576) [123.2 KB] || usa_insol.0720_searchweb.png (320x180) [75.0 KB] || usa_insol.0720_thm.png (80x40) [6.4 KB] || usa_insol_1080p30.mp4 (1920x1080) [17.6 MB] || usa_insol_720p30.mp4 (1280x720) [9.1 MB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || usa_insol_720p30.webm (1280x720) [4.8 MB] || usa_insol_2160p30.mp4 (3840x2160) [53.2 MB] || usa_insol_360p30.mp4 (640x360) [3.1 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || ",
"release_date": "2016-05-23T00:00:00-04:00",
"update_date": "2025-01-05T00:07:18.887809-05:00",
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"alt_text": "Insolation (the amount of sunlight reaching the ground) is affected dramatically by the Moon's shadow during the August 21, 2017 total solar eclipse.",
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{
"id": 4467,
"url": "https://svs.gsfc.nasa.gov/4467/",
"page_type": "Visualization",
"title": "2017 Solar Eclipse from L1",
"description": "The August 21, 2017 total solar eclipse as seen from a satellite in orbit around L1, a point about 1.5 million kilometers from Earth in the direction of the Sun. || eclipse_L1.0720_print.jpg (1024x576) [67.6 KB] || eclipse_L1.0720_searchweb.png (320x180) [39.9 KB] || eclipse_L1.0720_thm.png (80x40) [4.2 KB] || eclipse_L1_1080p30.mp4 (1920x1080) [10.0 MB] || eclipse_L1_720p30.mp4 (1280x720) [5.1 MB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || eclipse_L1_720p30.webm (1280x720) [5.6 MB] || eclipse_L1_2160p30.mp4 (3840x2160) [28.4 MB] || eclipse_L1_360p30.mp4 (640x360) [1.7 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || eclipse_L1_1080p30.mp4.hwshow [184 bytes] || ",
"release_date": "2016-05-23T00:00:00-04:00",
"update_date": "2025-01-05T23:03:39.592941-05:00",
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"alt_text": "The August 21, 2017 total solar eclipse as seen from a satellite in orbit around L1, a point about 1.5 million kilometers from Earth in the direction of the Sun.",
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"url": "https://svs.gsfc.nasa.gov/12049/",
"page_type": "Produced Video",
"title": "NASA On Air: NASA Previews 2017 Total Solar Eclipse (11/11/2015)",
"description": "LEAD: NASA scientists and astronomers are already planning for the first total solar eclipse for the United States in 38 years. 1. On August 21, 2017, the moon will pass between the sun and Earth in an alignment that will cast the moon's shadow onto Earth. 2. A dark shadow of the moon, 170 miles wide, will sweep across the U.S. over the course of one-and-a-half hours. 3. People in cities lying within the narrow path of the shadow (red line in the video) will experience an eerie sense of twilight as day turns to night and back to day again within roughly 2-2.5 minutes. TAG: Solar astronomers will use the solar eclipse to study the outer atmosphere of the sun. || IPAD_DELIVERABLES_2017SolarEclipse_iPad_1920x1080_print.jpg (1024x576) [43.0 KB] || IPAD_DELIVERABLES_2017SolarEclipse_iPad_1920x1080_searchweb.png (320x180) [44.7 KB] || IPAD_DELIVERABLES_2017SolarEclipse_iPad_1920x1080_thm.png (80x40) [3.7 KB] || NBC_TODAY_2017SolarEclipse_NBC_Today.mov (1920x1080) [10.7 MB] || 2017SolarEclipse.wmv (1280x720) [5.2 MB] || 2017SolarEclipse.avi (1280x720) [4.0 MB] || BARON_SERVICE_2017SolarEclipse_baron.mp4 (1920x1080) [14.5 MB] || IPAD_DELIVERABLES_2017SolarEclipse_iPad_960x540.m4v (960x540) [17.4 MB] || IPAD_DELIVERABLES_2017SolarEclipse_iPad_1280x720.m4v (1280x720) [32.6 MB] || IPAD_DELIVERABLES_2017SolarEclipse_iPad_1920x1080.m4v (1920x1080) [51.4 MB] || WEBM_2017SolarEclipse.webm (960x540) [7.2 MB] || WC_PRORES_422_2017SolarEclipse_prores.mov (1920x1080) [305.1 MB] || WSI_WEATHER_CHANNEL_2017SolarEclipse_1920x1080.mov (1920x1080) [401.4 MB] || WSI_WEATHER_CHANNEL_2017SolarEclipse_1280x720.mov (1280x720) [431.6 MB] || ",
"release_date": "2015-11-11T13:00:00-05:00",
"update_date": "2023-05-03T13:49:08.478882-04:00",
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"filename": "IPAD_DELIVERABLES_2017SolarEclipse_iPad_1920x1080_print.jpg",
"media_type": "Image",
"alt_text": "LEAD: NASA scientists and astronomers are already planning for the first total solar eclipse for the United States in 38 years. 1. On August 21, 2017, the moon will pass between the sun and Earth in an alignment that will cast the moon's shadow onto Earth. 2. A dark shadow of the moon, 170 miles wide, will sweep across the U.S. over the course of one-and-a-half hours. 3. People in cities lying within the narrow path of the shadow (red line in the video) will experience an eerie sense of twilight as day turns to night and back to day again within roughly 2-2.5 minutes. TAG: Solar astronomers will use the solar eclipse to study the outer atmosphere of the sun. \r\r",
"width": 1024,
"height": 576,
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},
{
"id": 4390,
"url": "https://svs.gsfc.nasa.gov/4390/",
"page_type": "Visualization",
"title": "2017 Eclipse: Earth, Moon and Sun",
"description": "The Moon moves right to left in its orbit around the Earth. The shadow it casts hits the Earth during the August 21, 2017 total solar eclipse. || sun_earth.0240_print.jpg (1024x576) [41.2 KB] || sun_earth.0240_searchweb.png (320x180) [37.9 KB] || sun_earth.0240_thm.png (80x40) [3.9 KB] || eclipse2017sunearth_1080p30.mp4 (1920x1080) [3.6 MB] || eclipse2017sunearth_720p30.mp4 (1280x720) [1.6 MB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || eclipse2017sunearth_720p30.webm (1280x720) [2.7 MB] || eclipse2017sunearth_360p30.mp4 (640x360) [514.7 KB] || eclipse2017sunearth_1080p30.mp4.hwshow [193 bytes] || ",
"release_date": "2015-10-20T00:00:00-04:00",
"update_date": "2025-01-05T22:50:38.885412-05:00",
"main_image": {
"id": 438663,
"url": "https://svs.gsfc.nasa.gov/vis/a000000/a004300/a004390/sun_earth_eclipse_print.jpg",
"filename": "sun_earth_eclipse_print.jpg",
"media_type": "Image",
"alt_text": "A print-resolution still image showing the Earth, Moon, and Sun at 17:05:40 UTC during the August 21, 2017 eclipse. The image is 12 × 9 inches at 300 DPI.",
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"height": 768,
"pixels": 786432
}
},
{
"id": 4314,
"url": "https://svs.gsfc.nasa.gov/4314/",
"page_type": "Visualization",
"title": "2017 Total Solar Eclipse in the U.S.",
"description": "A view of the United States during the total solar eclipse of August 21, 2017, showing the umbra (black oval), penumbra (concentric shaded ovals), and path of totality (red) through or very near several major cities. || usa.0780_print.jpg (1024x576) [144.7 KB] || usa.0780_searchweb.png (320x180) [90.1 KB] || usa.0780_thm.png (80x40) [6.8 KB] || eclipse2017usa_1080p30.mp4 (1920x1080) [26.0 MB] || eclipse2017usa_720p30.mp4 (1280x720) [14.0 MB] || eclipse2017usa_720p30.webm (1280x720) [5.0 MB] || fancy (1920x1080) [0 Item(s)] || eclipse2017usa_2160p30.mp4 (3840x2160) [69.5 MB] || eclipse2017usa_360p30.mp4 (640x360) [5.1 MB] || fancy (3840x2160) [0 Item(s)] || 9600x3240_3x1_30p (9600x3240) [0 Item(s)] || 2017_US_eclipse_4314.pptx [14.6 MB] || 2017_US_eclipse_4314.key [17.1 MB] || ",
"release_date": "2015-09-09T10:00:00-04:00",
"update_date": "2025-02-02T00:07:13.266670-05:00",
"main_image": {
"id": 442536,
"url": "https://svs.gsfc.nasa.gov/vis/a000000/a004300/a004314/usa.0780_print.jpg",
"filename": "usa.0780_print.jpg",
"media_type": "Image",
"alt_text": "A view of the United States during the total solar eclipse of August 21, 2017, showing the umbra (black oval), penumbra (concentric shaded ovals), and path of totality (red) through or very near several major cities.",
"width": 1024,
"height": 576,
"pixels": 589824
}
},
{
"id": 4324,
"url": "https://svs.gsfc.nasa.gov/4324/",
"page_type": "Visualization",
"title": "2017 Eclipse and the Moon's Orbit",
"description": "The Moon orbits the Earth in the months prior to the August 21, 2017 total solar eclipse. Viewed from above, the Moon's shadow appears to cross the Earth every month, but a side view reveals the five-degree tilt of the Moon's orbit. Its shadow only hits the Earth when the line of nodes, the fulcrum of its orbital tilt, is pointed toward the Sun. || orbit.0350_print.jpg (1024x576) [37.8 KB] || orbit.0350_searchweb.png (320x180) [37.6 KB] || orbit.0350_thm.png (80x40) [4.1 KB] || eclipse_orbit_720p30.webm (1280x720) [3.3 MB] || eclipse_orbit_1080p30.mp4 (1920x1080) [3.6 MB] || eclipse_orbit_720p30.mp4 (1280x720) [1.8 MB] || orbit (1920x1080) [0 Item(s)] || eclipse_orbit_1080p30.mov (1920x1080) [391.1 MB] || eclipse_orbit_360p30.mp4 (640x360) [662.1 KB] || 2017-eclipse-moon-orbit.hwshow [287 bytes] || ",
"release_date": "2015-09-09T10:00:00-04:00",
"update_date": "2025-01-05T00:06:11.513499-05:00",
"main_image": {
"id": 442179,
"url": "https://svs.gsfc.nasa.gov/vis/a000000/a004300/a004324/orbit.0350_print.jpg",
"filename": "orbit.0350_print.jpg",
"media_type": "Image",
"alt_text": "The Moon orbits the Earth in the months prior to the August 21, 2017 total solar eclipse. Viewed from above, the Moon's shadow appears to cross the Earth every month, but a side view reveals the five-degree tilt of the Moon's orbit. Its shadow only hits the Earth when the line of nodes, the fulcrum of its orbital tilt, is pointed toward the Sun.",
"width": 1024,
"height": 576,
"pixels": 589824
}
}
],
"sources": [],
"products": [
{
"id": 12693,
"url": "https://svs.gsfc.nasa.gov/12693/",
"page_type": "Produced Video",
"title": "A Total Solar Eclipse Revealed Solar Storms 100 Years Before Satellites",
"description": "Eclipses set the stage for historic science. NASA is taking advantage of the Aug. 21, 2017 eclipse by funding 11 ground-based scientific studies. As our scientists prepare their experiments for next week, we're looking back to an historic 1860 total solar eclipse, which many think gave humanity our first glimpse of solar storms — called coronal mass ejections — 100 years before scientists first understood what they were.Scientists observed these eruptions in the 1970s during the beginning of the modern satellite era, when satellites in space were able to capture thousands of images of solar activity that had never been seen before. But in hindsight, scientists realized their satellite images might not be the first record of these solar storms. Hand-drawn records of an 1860 total solar eclipse bore surprising resemblance to these groundbreaking satellite images.Eclipse archive imagery from: http://mlso.hao.ucar.edu/hao-eclipse-archive.php || ",
"release_date": "2017-08-17T11:00:00-04:00",
"update_date": "2023-05-03T13:47:25.682531-04:00",
"main_image": {
"id": 411950,
"url": "https://svs.gsfc.nasa.gov/vis/a010000/a012600/a012693/LARGE_MP4-12693_FirstCMEDuringEclipse_large.00139_print.jpg",
"filename": "LARGE_MP4-12693_FirstCMEDuringEclipse_large.00139_print.jpg",
"media_type": "Image",
"alt_text": "Complete transcript available.Music credits: ‘Electricity Wave’ by Jean-François Berger [SACEM] and ‘Solar Winds’ by Ben Niblett [PRS], Jon Cotton [PRS]Watch this video on the NASA Goddard YouTube channel.",
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}
}
],
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}