Astronomers find seven Earth-like planets

In a much-anticipated announcement NASA says it has found seven Earth-sized planets which may hold life.

NASA twitter

Source: NASA twitter

宇航员发现了一个附近的星系,有七个地球尺寸类似的星球绕行着同一颗恒星,最重要的是温度温暖,可能在覆盖星球的大气层上有水,有孕育生命的希望。
周三发布的这项研究显示,这颗叫做TRAPPIST-1 的矮恒星距离地球大约40光年,其直径大约是太阳的8%,所有7颗新发现的行星都在它附近的紧密结构中被发现。这颗恒星至少存在了5亿年,但是其寿命可能达到10万亿年。
Around a nearby, cold, small star we found 7 rocky Earth-size planets, all of which could have liquid water - key to life as we know it. pic.twitter.com/C2JWjDfBdK — NASA (@NASA) February 22, 2017
综合媒体报道,这项发布在《自然》期刊上的研究指出,这些行星都是崎岖的星球,不像木星那样多属气体状态,而且温度适宜,如果存在液体——其中三颗星球与该恒星距离相宜,从表面看来甚至可能有液态水——研究人员相信,这可能是太阳系之外,最适合人居的地方。

目前科学家们已经在太阳系外发现了3500多个行星。这项惊人的发现为人类寻找地球以外的新世界带来极大的希望。

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