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7 Earth-Sized Planets Discovered
天文学家发现7个地球大小的行星
Astronomers have discovered 7 earth-sized planets orbiting a dwarf star outside of our solar system. Researchers believe that at least three of the planets could be suitable for life because of their size and proximity to their star. The red star, named TRAPPIST-1, is half the temperature of the Sun and only one tenth of the mass. Researchers discovered the planets after noticing small shadows interrupting TRAPPIST-1's starlight. The next step is to investigate the atmosphere of each planet and find out if any of them have signs of life, such as liquid water on the surface. The planets are 40 light years away from Earth.
天文学家在太阳系外发现7个地球大小的行星围绕着一颗矮星转动。研究人员根据它们的尺寸以及与恒星的相似度，相信其中至少有三颗行星适合生命生存。一颗红色的行星被命名为TRAPPIST-1，它的温度是太阳温度的一半，质量是太阳的十分之一。研究人员在发现有光影干扰TRAPPIST-1的星光之后，发现了这些行星。下一步就是调查每颗行星的大气层，查明它们是否有生命的迹象，比如星球表面是否有液态水。这些行星距离地球40光年。
译文属可可英语原创，未经允许，不得转载。
