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(black oval), penumbra (concentric shaded ovals), and path of totality (red) through or very near several major cities.", "width": 0, "height": 0, "pixels": 0 } } ], "extra_data": {} }, { "id": 336736, "url": "https://svs.gsfc.nasa.gov/4314/#media_group_336736", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "On Monday, August 21, 2017, the Moon will pass in front of the Sun, casting its shadow across all of North America. This will be the first total solar eclipse visible in the contiguous United States in 38 years.

The Moon's shadow can be divided into areas called the umbra and the penumbra. Within the penumbra, the Sun is only partially blocked, and observers experience a partial eclipse. The much smaller umbra lies at the very center of the shadow cone, and anyone there sees the Moon entirely cover the Sun in a total solar eclipse.

In the animation, the umbra is the small black oval. The red streak behind this oval is the path of totality. Anyone within this path will see a total eclipse when the umbra passes over them. The much larger shaded bullseye pattern represents the penumbra. Steps in the shading denote different percentages of Sun coverage (eclipse magnitude), at levels of 90%, 75%, 50% and 25%. The yellow and orange contours map the path of the penumbra. The outermost yellow contour is the edge of the penumbra path. Outside this limit, no part of the Sun is covered by the Moon.

The numbers in the lower left corner give the latitude and longitude of the center of the umbra as it moves eastward, along with the altitude of the Sun above the horizon at that point. Also shown is the duration of totality: for anyone standing at the center point, this is how long the total solar eclipse will last. Note that the duration varies from just 2 minutes on the West Coast to 2 minutes 40 seconds east of the Mississippi River.

About Accuracy

You might think that calculating the circumstances of an eclipse would be, if not easy, then at least precise. If you do the math correctly, you’d expect to get exactly the same answers as everyone else. But the universe is more subtle than that. The Earth is neither smooth nor perfectly spherical, nor does it rotate at a perfectly constant, predictable speed. The Moon isn’t smooth, either, which means that the shadow it casts isn’t a simple circle. And our knowledge of the size of the Sun is uncertain by a factor of about 0.2%, enough to affect the duration of totality by several seconds.

Everyone who performs these calculations will make certain choices to simplify the math or to precisely define an imperfectly known number. The choices often depend on the goals and the computing resources of the calculator, and as you'd expect, the results will differ slightly. You can get quite good results with a relatively simple approach, but it sometimes takes an enormous effort to get only slightly better answers.

The following table lists some of the constants and data used for this animation.

Earth radius6378.137 km
Earth flattening1 / 298.257 (the WGS 84 ellipsoid)
Moon radius1737.4 km (k = 0.2723993)
Sun radius696,000 km (959.634 arcsec at 1 AU)
EphemerisDE 421
Earth orientationearth_070425_370426_predict.bpc (ΔT corrected)
Delta UTC68.184 seconds (TT – TAI + 36 leap seconds)

A number of sources explain Bessel’s method of solar eclipse calculation, including chapter 9 of Astronomy on the Personal Computer by Oliver Montenbruck and Thomas Pflager and the eclipses chapter of The Explanatory Supplement to the Astronomical Almanac. The method was adapted to the routines available in NAIF's SPICE software library.

The value for the radius of the Moon is slightly larger than the one used by Fred Espenak and slightly smaller than the one used by the Astronomical Almanac. The Sun radius is the one used most often, but see figure 1 in M. Emilio et al., Measuring the Solar Radius from Space during the 2003 and 2006 Mercury Transits for a sense of the uncertainty in this number.

Both the elevations of locations on the Earth and the irregular limb of the Moon were ignored. The resulting small errors mostly affect the totality duration calculation, but they tend to cancel out—elevations above sea level slightly lengthen totality, while valleys along the lunar limb slightly shorten it. The effect on the rendered images is negligible (smaller than a pixel).

Another minor complication that's ignored here is the difference between the Moon's center of mass (the position reported in the ephemeris) and its center of figure (the center of the disk as seen from Earth). These two centers don't exactly coincide because the Moon's mass isn't distributed evenly, but the difference is quite small, about 0.5 kilometers.", "items": [], "extra_data": {} }, { "id": 336738, "url": "https://svs.gsfc.nasa.gov/4314/#media_group_336738", "widget": "Video player", "title": "", "caption": "", "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). 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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", "main_image": { "id": 1, "url": "https://svs.gsfc.nasa.gov/images/no_preview_web_black.png", "filename": "no_preview_web_black.png", "media_type": "Image", "alt_text": "Current Airborne Fleet", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 12678, "url": "https://svs.gsfc.nasa.gov/12678/", "page_type": "B-Roll", "title": "Eclipse Watching B-Roll At NASA Goddard", "description": "B-roll for August 21st Eclipse, filmed at NASA'S Goddard Space Flight Center's mall and visitor center. || GSFC_ECLIPSE2017BROLL_TW@N_Handleman.06600_print.jpg (1024x576) [177.8 KB] || GSFC_ECLIPSE2017BROLL_TW@N_Handleman.06600_searchweb.png (320x180) [115.7 KB] || GSFC_ECLIPSE2017BROLL_TW@N_Handleman.06600_thm.png (80x40) [7.9 KB] || GSFC_ECLIPSE2017BROLL_TW@N_Handleman.webm (1280x720) [30.1 MB] || GSFC_ECLIPSE2017BROLL_TW@N_Handleman.mp4 (1280x720) [266.8 MB] || GSFC_ECLIPSE2017BROLL_TW@N_Handleman.mov (1280x720) [3.2 GB] || ", "release_date": "2017-08-21T18:00:00-04:00", "update_date": "2023-05-03T13:47:25.443920-04:00", "main_image": { "id": 412263, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012600/a012678/GSFC_ECLIPSE2017BROLL_TW@N_Handleman.06600_print.jpg", "filename": "GSFC_ECLIPSE2017BROLL_TW@N_Handleman.06600_print.jpg", "media_type": "Image", "alt_text": "B-roll for August 21st Eclipse, filmed at NASA'S Goddard Space Flight Center's mall and visitor center.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12565, "url": "https://svs.gsfc.nasa.gov/12565/", "page_type": "Produced Video", "title": "Are You Ready for the Eclipse? (Live Interviews on Aug. 16, 2017)", "description": "Canned interviews and b-roll will be available here starting Tuesday, August 15, at 6:00 p.m. ET. || safety-ls.png (1211x676) [641.9 KB] || safety-ls_print.jpg (1024x571) [82.6 KB] || safety-ls_searchweb.png (320x180) [69.5 KB] || safety-ls_thm.png (80x40) [5.8 KB] || ", "release_date": "2017-08-06T00:00:00-04:00", "update_date": "2023-05-03T13:47:29.362953-04:00", "main_image": { "id": 412303, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012500/a012565/safety-ls.png", "filename": "safety-ls.png", "media_type": "Image", "alt_text": "Canned interviews and b-roll will be available here starting Tuesday, August 15, at 6:00 p.m. ET.", "width": 1211, "height": 676, "pixels": 818636 } }, { "id": 12648, "url": "https://svs.gsfc.nasa.gov/12648/", "page_type": "Produced Video", "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", "update_date": "2023-05-03T13:47:32.550643-04:00", "main_image": { "id": 413354, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012600/a012648/MoonsRoleEclipseThumnail_print.jpg", "filename": "MoonsRoleEclipseThumnail_print.jpg", "media_type": "Image", "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.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4579, "url": "https://svs.gsfc.nasa.gov/4579/", "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", "update_date": "2025-01-05T00:08:25.190336-05:00", "main_image": { "id": 413484, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004579/night_to_day.0300_print.jpg", "filename": "night_to_day.0300_print.jpg", "media_type": "Image", "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.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12534, "url": "https://svs.gsfc.nasa.gov/12534/", "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] || ", "release_date": "2017-06-14T00:00:00-04:00", "update_date": "2024-10-10T00:17:01.312358-04:00", "main_image": { "id": 415756, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012500/a012534/EclipsePlane_V7.00001_print.jpg", "filename": "EclipsePlane_V7.00001_print.jpg", "media_type": "Image", "alt_text": "Music: Witch Waltz by Dorian KellyComplete transcript available.Watch this video on the NASA Goddard YouTube channel.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12625, "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", "description": "B-roll for the live shots || eclipse_6_21_17_b-roll.00001_print.jpg (1024x576) [85.9 KB] || eclipse_6_21_17_b-roll.00001_web.png (320x180) [50.5 KB] || eclipse_6_21_17_b-roll.00001_thm.png (80x40) [5.5 KB] || eclipse_6_21_17_b-roll.00001_searchweb.png (320x180) [50.5 KB] || eclipse_6_21_17_b-roll.webm (1280x720) [40.3 MB] || eclipse_6_21_17_b-roll.mov (1280x720) [5.5 GB] || ", "release_date": "2017-06-13T14:00:00-04:00", "update_date": "2023-05-03T13:47:36.391531-04:00", "main_image": { "id": 414060, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012600/a012625/eclipse_6_21_17_b-roll.00001_print.jpg", "filename": "eclipse_6_21_17_b-roll.00001_print.jpg", "media_type": "Image", "alt_text": "B-roll for the live shots", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4552, "url": "https://svs.gsfc.nasa.gov/4552/", "page_type": "Visualization", "title": "2017 Eclipse State Maps", "description": "The path of totality passes through 14 states during the total solar eclipse on August 21, 2017. A map of each of these states, created for NASA's official eclipse 2017 website, is presented here. Except for Montana, each map is 8 inches wide (or high) at 300 DPI. The umbra is shown at 3-minute intervals, with times in the local time zone at the umbra center. The duration of totality is outlined in 30-second increments. Interstate highways are blue, other major roads are red, and secondary roads are gray.Some sources list only 12 states for this eclipse, but in fact the path of totality also grazes the southwestern borders of both Montana and Iowa. The Montana part of the path is in a roadless area at the southern end of the Beaverhead Mountains, a range that defines sections of both the Montana-Idaho border and the Continental Divide. The Iowa part of the path is west of Interstate 29 near Hamburg, south of 310 Street, and bounded on the west by the Missouri River. It includes the Lower Hamburg Bend Wildlife Management Area. || ", "release_date": "2017-02-06T00:00:00-05:00", "update_date": "2024-10-09T00:07:12.503391-04:00", "main_image": { "id": 416580, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004552/or_preview.jpg", "filename": "or_preview.jpg", "media_type": "Image", "alt_text": "Oregon", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12412, "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", "update_date": "2023-05-03T13:48:03.972681-04:00", "main_image": { "id": 418574, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012400/a012412/eclipsethumb.jpg", "filename": "eclipsethumb.jpg", "media_type": "Image", "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.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 4515, "url": "https://svs.gsfc.nasa.gov/4515/", "page_type": "Visualization", "title": "2017 Path of Totality", "description": "This visualization closely follows the Moon's umbra shadow as it passes over the United States during the August 21, 2017 total solar eclipse. It covers the one hour and 40 minutes between 10:12 am PDT and 2:52 pm EDT. Through the use of a number of NASA datasets, notably the global elevation maps from Lunar Reconnaissance Orbiter, the shape and location of the shadow is depicted with unprecedented accuracy. || usa.0500_print.jpg (1024x576) [257.5 KB] || usa.0500_searchweb.png (320x180) [108.8 KB] || usa.0500_thm.png (80x40) [7.1 KB] || usa (1280x720) [0 Item(s)] || totpath2017_720p30.webm (1280x720) [22.3 MB] || totpath2017_1080p30.mp4 (1920x1080) [190.1 MB] || totpath2017_720p30.mp4 (1280x720) [123.2 MB] || totpath2017_360p30.mp4 (640x360) [40.4 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || totpath2017_4515.key [125.2 MB] || totpath2017_4515.pptx [124.7 MB] || totpath2017_2160p30.mp4 (3840x2160) [407.4 MB] || ", "release_date": "2016-12-13T00:00:00-05:00", "update_date": "2025-01-05T00:07:37.315645-05:00", "main_image": { "id": 418884, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004515/usa.0500_print.jpg", "filename": "usa.0500_print.jpg", "media_type": "Image", "alt_text": "This visualization closely follows the Moon's umbra shadow as it passes over the United States during the August 21, 2017 total solar eclipse. It covers the one hour and 40 minutes between 10:12 am PDT and 2:52 pm EDT. Through the use of a number of NASA datasets, notably the global elevation maps from Lunar Reconnaissance Orbiter, the shape and location of the shadow is depicted with unprecedented accuracy.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4516, "url": "https://svs.gsfc.nasa.gov/4516/", "page_type": "Visualization", "title": "2017 Path of Totality: Oblique View", "description": "This animation closely follows the Moon's umbra shadow as it passes over the United States during the August 21, 2017 total solar eclipse. Through the use of a number of NASA datasets, notably the global elevation maps from Lunar Reconnaissance Orbiter, the shape and location of the shadow is depicted with unprecedented accuracy. || usa_oblique.4044_print.jpg (1024x576) [307.4 KB] || usa_oblique.4044_searchweb.png (320x180) [115.3 KB] || usa_oblique.4044_thm.png (80x40) [6.7 KB] || totpathoblq2017_720p30.webm (1280x720) [22.6 MB] || totpathoblq2017_720p30.mp4 (1280x720) [117.9 MB] || totpathoblq2017_1080p30.mp4 (1920x1080) [207.3 MB] || totpathoblq2017_360p30.mp4 (640x360) [39.7 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || totpathoblq2017_4516.key [120.0 MB] || totpathoblq2017_4516.pptx [119.6 MB] || totpathoblq2017_2160p30.mp4 (3840x2160) [499.6 MB] || ", "release_date": "2016-12-13T00:00:00-05:00", "update_date": "2025-01-05T00:07:38.071880-05:00", "main_image": { "id": 418904, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004516/usa_oblique.4044_print.jpg", "filename": "usa_oblique.4044_print.jpg", "media_type": "Image", "alt_text": "This animation closely follows the Moon's umbra shadow as it passes over the United States during the August 21, 2017 total solar eclipse. Through the use of a number of NASA datasets, notably the global elevation maps from Lunar Reconnaissance Orbiter, the shape and location of the shadow is depicted with unprecedented accuracy.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4517, "url": "https://svs.gsfc.nasa.gov/4517/", "page_type": "Visualization", "title": "Umbra Shapes", "description": "This animation shows the shape of the Moon's umbral shadow during the August 21, 2017 total solar eclipse, calculated at three different levels of detail. The dark gray is the closest to the true shape. || umbra.0526_print.jpg (1024x576) [40.0 KB] || umbra.0526_searchweb.png (320x180) [19.1 KB] || umbra.0526_thm.png (80x40) [2.8 KB] || umbra_shapes_1080p30.mp4 (1920x1080) [7.3 MB] || umbra_shapes_720p30.mp4 (1280x720) [4.4 MB] || shapes (1920x1080) [0 Item(s)] || umbra_shapes_720p30.webm (1280x720) [10.0 MB] || umbra_shapes_360p30.mp4 (640x360) [1.9 MB] || solar-eclipse-umbra-shapes.hwshow [214 bytes] || ", "release_date": "2016-12-13T00:00:00-05:00", "update_date": "2025-01-05T23:09:56.262293-05:00", "main_image": { "id": 418909, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004517/umbra.0526_print.jpg", "filename": "umbra.0526_print.jpg", "media_type": "Image", "alt_text": "This animation shows the shape of the Moon's umbral shadow during the August 21, 2017 total solar eclipse, calculated at three different levels of detail. The dark gray is the closest to the true shape.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4518, "url": "https://svs.gsfc.nasa.gov/4518/", "page_type": "Visualization", "title": "2017 Total Solar Eclipse Map and Shapefiles", "description": "A map of the United States showing the path of totality for the August 21, 2017 total solar eclipse. This is version 2 of the map, available at both 5400 × 2700 and 10,800 × 5400. || usa_eclipse_map_v2_print.jpg (1024x512) [192.9 KB] || usa_eclipse_map_v2.tif (5400x2700) [26.7 MB] || usa_eclipse_map_v2x2.tif (10800x5400) [85.4 MB] || ", "release_date": "2016-12-13T00:00:00-05:00", "update_date": "2025-01-05T00:07:38.455547-05:00", "main_image": { "id": 418929, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004518/usa_eclipse_map_v2_print.jpg", "filename": "usa_eclipse_map_v2_print.jpg", "media_type": "Image", "alt_text": "A map of the United States showing the path of totality for the August 21, 2017 total solar eclipse. This is version 2 of the map, available at both 5400 × 2700 and 10,800 × 5400.", "width": 1024, "height": 512, "pixels": 524288 } }, { "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", "main_image": { "id": 424386, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004400/a004466/usa_insol.0720_print.jpg", "filename": "usa_insol.0720_print.jpg", "media_type": "Image", "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.", "width": 1024, "height": 576, "pixels": 589824 } }, { "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", "main_image": { "id": 424407, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004400/a004467/eclipse_L1.0720_print.jpg", "filename": "eclipse_L1.0720_print.jpg", "media_type": "Image", "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.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12049, "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", "main_image": { "id": 437754, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012000/a012049/IPAD_DELIVERABLES_2017SolarEclipse_iPad_1920x1080_print.jpg", "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, "pixels": 589824 } }, { "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.", "width": 1024, "height": 768, "pixels": 786432 } }, { "id": 4321, "url": "https://svs.gsfc.nasa.gov/4321/", "page_type": "Visualization", "title": "2017 Eclipse Shadow Cones", "description": "The umbral and penumbral shadow cones travel across the surface of the Earth during the August 21, 2017 total solar eclipse. || cones.0885_print.jpg (1024x576) [79.2 KB] || cones.0885_searchweb.png (320x180) [46.7 KB] || cones.0885_thm.png (80x40) [4.1 KB] || shadow_cones_1080p30.mp4 (1920x1080) [13.9 MB] || shadow_cones_720p30.mp4 (1280x720) [6.9 MB] || shadow_cones_720p30.webm (1280x720) [5.6 MB] || shadow_cones_720p30.wmv (1280x720) [17.9 MB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || shadow_cones_360p30.mp4 (640x360) [2.3 MB] || 2017-eclipse-shadow-cones-mp4.hwshow [217 bytes] || ", "release_date": "2015-09-09T10:00:00-04:00", "update_date": "2025-01-05T00:06:11.167278-05:00", "main_image": { "id": 442334, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004300/a004321/cones.0885_print.jpg", "filename": "cones.0885_print.jpg", "media_type": "Image", "alt_text": "The umbral and penumbral shadow cones travel across the surface of the Earth during the August 21, 2017 total solar eclipse.", "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": 12669, "url": "https://svs.gsfc.nasa.gov/12669/", "page_type": "Produced Video", "title": "A New View of August's Total Solar Eclipse", "description": "During the August 2017 total solar eclipse, scientists will use the Earth Polychromatic Imaging Camera (EPIC) on the Deep Space Climate Observatory (DSCOVR) satellite, along with measurements taken from within the moon's shadow on the ground, to test a new model of Earth's energy budget. || ", "release_date": "2017-07-20T10:00:00-04:00", "update_date": "2023-05-03T13:47:32.870727-04:00", "main_image": { "id": 412987, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012600/a012669/LARGE_MP4-EPICEclipse_Rescript_large.00696_print.jpg", "filename": "LARGE_MP4-EPICEclipse_Rescript_large.00696_print.jpg", "media_type": "Image", "alt_text": "Music: Dawn Drone by Juan Jose Alba Gomez [SGAE]Complete transcript available.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12481, "url": "https://svs.gsfc.nasa.gov/12481/", "page_type": "Produced Video", "title": "2017's All American Solar Eclipse", "description": "On August 21, 2017, a solar eclipse will be visible across North America. || usa_suns.0750_print.jpg (1024x576) [140.4 KB] || usa_suns.0750_1024x576.jpg (1024x576) [129.2 KB] || usa_suns.0750_searchweb.png (320x180) [88.7 KB] || usa_suns.0750_thm.png (80x40) [6.9 KB] || usa_suns.0750.tif (1920x1080) [5.0 MB] || ", "release_date": "2017-03-27T12:00:00-04:00", "update_date": "2023-05-03T13:47:49.365449-04:00", "main_image": { "id": 416972, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012400/a012481/usa_suns.0750_print.jpg", "filename": "usa_suns.0750_print.jpg", "media_type": "Image", "alt_text": "On August 21, 2017, a solar eclipse will be visible across North America.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 12117, "url": "https://svs.gsfc.nasa.gov/12117/", "page_type": "Produced Video", "title": "Visualizing the 2017 All-American Eclipse", "description": "Complete transcript available.Watch this video on the NASAgovVideo YouTube channel.This video is also available on our YouTube channel. || 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] || LARGE_MP4_12117_visualizing_2017_eclipseV2_large.mp4 (1920x1080) [98.4 MB] || 12117_visualizing_2017_eclipseV2.mov (1920x1080) [2.6 GB] || YOUTUBE_HQ_12117_visualizing_2017_eclipseV2_youtube_hq.mov (1920x1080) [302.9 MB] || WEBM_12117_visualizing_2017_eclipseV2.webm (960x540) [37.4 MB] || PRORES_B-ROLL_12117_visualizing_2017_eclipseV2_prores.mov (1280x720) [1.3 GB] || 12117_visualizing_2017_eclipseV2.en_US.srt [1.5 KB] || 12117_visualizing_2017_eclipseV2.en_US.vtt [1.5 KB] || 12117_visualizing_2017_eclipseV2_lowres.mp4 (480x272) [13.6 MB] || NASA_PODCAST_12117_visualizing_2017_eclipseV2_ipod_sm.mp4 (320x240) [17.1 MB] || ", "release_date": "2016-04-14T12:00:00-04:00", "update_date": "2023-05-03T13:48:43.369447-04:00", "main_image": { "id": 436253, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012100/a012117/sun_earth.0240_print.jpg", "filename": "sun_earth.0240_print.jpg", "media_type": "Image", "alt_text": "Complete transcript available.Watch this video on the NASAgovVideo YouTube channel.This video is also available on our YouTube channel.", "width": 1024, "height": 576, "pixels": 589824 } } ], "newer_versions": [], "older_versions": [], "alternate_versions": [ { "id": 4554, "url": "https://svs.gsfc.nasa.gov/4554/", "page_type": "Visualization", "title": "August 21, 2017 Total Solar Eclipse Path for Spherical Displays", "description": "A map-like view of the Earth during the total solar eclipse of August 21, 2017, showing the umbra (black oval), penumbra (concentric shaded ovals), and the path of totality (red). This equirectangular projection is suitable for spherical displays and for spherical mapping in 3D animation software. || eclipse.0800_print.jpg (1024x512) [113.6 KB] || eclipse.0800_searchweb.png (320x180) [65.4 KB] || eclipse.0800_thm.png (80x40) [6.0 KB] || eclipse_1024p15.mp4 (2048x1024) [31.2 MB] || eclipse_2048p15.mp4 (4096x2048) [85.6 MB] || eclipse_512p15.mp4 (1024x512) [9.6 MB] || 4096x2048_2x1_15p (4096x2048) [0 Item(s)] || eclipse_512p15.webm (1024x512) [8.4 MB] || ", "release_date": "2017-02-15T00:00:00-05:00", "update_date": "2025-02-02T22:31:57.208403-05:00", "main_image": { "id": 416217, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004554/eclipse.0800_print.jpg", "filename": "eclipse.0800_print.jpg", "media_type": "Image", "alt_text": "A map-like view of the Earth during the total solar eclipse of August 21, 2017, showing the umbra (black oval), penumbra (concentric shaded ovals), and the path of totality (red). This equirectangular projection is suitable for spherical displays and for spherical mapping in 3D animation software.", "width": 1024, "height": 512, "pixels": 524288 } } ] }