File:NASA - Alien Atmospheres CcUhVCMAhAI.webm
Original file (WebM audio/video file, VP9/Opus, length 3 min 21 s, 1,280 × 720 pixels, 948 kbps overall, file size: 22.73 MB)
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Summary
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English: Since the early 1990's, astronomers have known that extrasolar planets, or \"exoplanets,\" orbit stars light-years beyond our own solar system. Although most exoplanets are too distant to be directly imaged, detailed studies have been made of their size, composition, and even atmospheric makeup - but how? By observing periodic variations in the parent star's brightness and color, astronomers can indirectly determine an exoplanet's distance from its star, its size, and its mass. But to truly understand an exoplanet astronomers must study its atmosphere, and they do so by splitting apart the parent star's light during a planetary transit.
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| Source | YouTube: NASA - Alien Atmospheres – View/save archived versions on archive.org and archive.today |
| Author | NASA Goddard |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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This file, which was originally posted to YouTube: NASA, was reviewed on 20 November 2020 by the automatic software YouTubeReviewBot, which confirmed that this video was available there under the stated Creative Commons license on that date. This file should not be deleted if the license has changed in the meantime. The Creative Commons license is irrevocable.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:47, 19 November 2020 | 3 min 21 s, 1,280 × 720 (22.73 MB) | Eatcha (talk | contribs) | Uploaded NASA | Alien Atmospheres by NASA Goddard from Youtube |
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