Europa Water Vapor Plume (Illustration) : 無料・フリー素材/写真
Europa Water Vapor Plume (Illustration) / NASA Hubble
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | This is an artist's concept of a plume of water vapor ejected off of the frigid, icy surface of the Jovian moon Europa, located 500 million miles from the Sun. The Hubble Space Telescope observed water vapor above the frigid south polar region of Jupiter's moon Europa, providing the first strong evidence of water plumes erupting off the moon's surface.Hubble didn't photograph plumes, but spectroscopically detected auroral emissions from oxygen and hydrogen. Hubble's measurements led scientists to calculate that a plume on Europa could rise to an altitude of 125 miles (201 km) and then probably rains frost back onto the moon's surface. For decades scientists have hypothesized that the icy crust on Europa covers a subsurface ocean. Astronomers do not know yet whether these plumes are connected to subsurface liquid water or not. This venting doesn't seem unique. In 2005, NASA's Cassini spacecraft discovered similar water vapor plumes spewing off of the tiny moon Enceladus orbiting Saturn.For more information, visit: hubblesite.org/contents/news-releases/2013/news-2013-55.htmlCredit: NASA, ESA, and K. Retherford (Southwest Research Institute) |
| 撮影日 | 2019-08-15 12:57:39 |
| 撮影者 | NASA Hubble |
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