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7 Earth-Sized Planets Discovered
天文學(xué)家發(fā)現(xiàn)7個(gè)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.
天文學(xué)家在太陽(yáng)系外發(fā)現(xiàn)7個(gè)地球大小的行星圍繞著一顆矮星轉(zhuǎn)動(dòng)。研究人員根據(jù)它們的尺寸以及與恒星的相似度，相信其中至少有三顆行星適合生命生存。一顆紅色的行星被命名為TRAPPIST-1，它的溫度是太陽(yáng)溫度的一半，質(zhì)量是太陽(yáng)的十分之一。研究人員在發(fā)現(xiàn)有光影干擾TRAPPIST-1的星光之后，發(fā)現(xiàn)了這些行星。下一步就是調(diào)查每顆行星的大氣層，查明它們是否有生命的跡象，比如星球表面是否有液態(tài)水。這些行星距離地球40光年。
譯文屬可可英語(yǔ)原創(chuàng)，未經(jīng)允許，不得轉(zhuǎn)載。
