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File:Artist's impression of gas streaming from GJ 3470b.tif

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English: This artist's impression shows a giant cloud of hydrogen streaming off a warm, Neptune-sized planet just 97 light-years from Earth. The exoplanet is tiny compared to its star, a red dwarf named GJ 3470. The star's intense radiation is heating the hydrogen in the planet's upper atmosphere to a point where it escapes into space. The alien world is losing hydrogen at a rate 100 times faster than a previously observed warm Neptune whose atmosphere is also evaporating away.
日期
來源 https://www.spacetelescope.org/images/opo1852a/
作者 NASA, ESA, and D. Player (STScI)

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