Solidot: 天文学家发现地球的“孪生兄弟”

Solidot

奇客的资讯，重要的东西

天文学家发现地球的"孪生兄弟"
http://solidot.org.feedsportal.com/c/33236/f/556826/s/398091b6/sc/28/l/0L0Ssolidot0Borg0Cstory0Dsid0F39195/story01.htm
Apr 18th 2014, 08:50




天文学家首次在一颗恒星的宜居带发现了一颗地球大小的行星。行星编号为Kepler 186f，直径1.4万公里，比地球的1.27万公里大10%，其轨道位于母星Kepler 186的宜居带，表面温度既不太热也不太冷，满足液态水的存在要求。Kepler-186位于天鹅星座，是一颗M型矮星，质量和亮度是太阳的二分之一，距离地球500光年，整个星系有5颗行星，其中Kepler 186f公转一周130天，表面接受到的热能是地球从太阳所接受热能的三分之一。此前在宜居带发现了的类地球行星都属于超级地球，大小最小也比地球大40%。This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers.



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