Gas Giant Around a Red Dwarf (Illustration) : 無料・フリー素材/写真
Gas Giant Around a Red Dwarf (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 gas giant planet orbiting a red dwarf star. The planet has not been directly imaged, but its presence was detected in microlensing observations of a field star in our galaxy taken in 2003. Gravitational microlensing happens when a foreground star amplifies the light of a background star that momentarily aligns with it. Follow-up observations by Hubble Space Telescope in 2005 separated the light of the slightly offset foreground star from the background star. This allowed the host star to be identified as a red dwarf located 19,000 light-years away. The Hubble observations allowed astronomers to estimate that the planet's mass is 2.6 times greater than Jupiter's. The characteristics of the lensing event show that the planet is in a Jupiter-sized orbit around its parent star. The rings and moon around the gas giant are hypothetical, but plausible, given the nature of the family of gas giant planets in our solar system.For more information, visit: hubblesite.org/contents/news-releases/2006/news-2006-38.htmlCredit: NASA, ESA, and G. Bacon (STScI) |
| 撮影日 | 2019-09-25 10:14:18 |
| 撮影者 | NASA Hubble |
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