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美国国家航空航天局于美国东部时间2月22日下午1点宣布,科学家利用斯皮策太空望远镜首次发现了一个包含7颗地球大小行星的行星系统。7颗行星中的3颗位于宜居带内,这刷新了太阳系外围绕一颗恒星运行的宜居行星数量的纪录。科学家还发现3颗行星上很可能有液态水——我们知道水是维系生命存在的关键。这条爆炸性新闻迅速吸引了全球人的眼光。
NASA announced at 1 pm on the 22nd of the U.S. Eastern Time that scientists first discovered a planetary system containing seven Earth-sized planets using the Spitzer Space Telescope. Three of the seven planets are in livable zones, setting the record for the number of livable planets that run around a star outside the solar system. Scientists have also found that there are likely to be liquid water on three planets - and we know that water is the key to life. This explosive news quickly caught the eye of the world.