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さまざまな宇宙、空中現象の最新自動観測撮影装置ロボットSID-1(シドワン=Space Intrusion Detection systems-1)が捕らえた謎の現象や物体とUFO *撮影画像は、左下部のカテゴリーからSID-1~を選択(随時更新) *メディア、報道関係者の方へ:不思議な動画、静止画、解析画像多数有ります。情報、著作権等の権利は当観測所です。連絡先はプロフィール参照。

Closest Rocky Alien Planet Discovered

2015-07-30 Thu 18:15

Closest Rocky Alien Planet Discovered
Date: 30 July 2015 Time: 06:15 PM ET

Astronomers have discovered a rocky exoplanet that lies just 21 light-years from Earth — closer than any other confirmed rocky alien world.

The alien planet, called HD 219134b, is about 4.5 times more massive than Earth, making it a so-called "super Earth," a new study reports. HD 219134b lies extremely close to its host star, completing one orbit every three days, so its surface is too hot to harbor life as we know it, researchers said.

And HD 219134b is not alone. Astronomers found three other planets in the system as well, one of which is at least 2.7 times as massive as Earth and orbits the star once every 6.8 days. Another is a Neptune-like world nine times more massive than Earth with a 47-day orbit; the third planet is 62 times more massive than Earth and takes 1,190 days to complete one lap around the host star.

http://m.space.com/30112-closest-rocky-alien-planet-found.html

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