美國宇航局的“外星獵手”在“宜居帶”發(fā)現首個地球大小的世界

美國宇航局的“外星獵手”在“宜居帶”發(fā)現首個地球大小的世界

Since its launch in April 2018, NASA’s Transiting Exoplanet Survey Satellite (TESS) has found a great number of exoplanets, including a so-called “missing link.”

自2018年4月發(fā)射以來，NASA的凌日系外行星勘測衛(wèi)星(Transiting Exoplanet Survey Satellite，簡稱TESS)已經發(fā)現了大量的系外行星，包括所謂的“缺失的一環(huán)”。

But now, the alien planet hunter has discovered its first Earth-sized planet in a star’s “habitable zone,” an area that could allow for liquid water to be on the surface.

但是現在，“外星獵人”在一顆恒星的“宜居帶”發(fā)現了第一顆與地球大小相當的行星。“宜居帶”是一個允許液態(tài)水存在的區(qū)域。

Known as TOI 700 d, the planet is orbiting the star TOI 700, described as a “small, cool M dwarf star.” It is 101.5 light-years from Earth in the southern constellation Dorado. One light-year is the equivalent of 6 trillion miles.

這顆行星被稱為TOI 700d，它圍繞著一顆名為TOI 700的恒星運行，距離地球101.5光年，位于南天星座多拉多。一光年相當于6萬億英里。

TOI 700 d, the outermost known planet in the system, is approximately 20 percent larger than Earth and orbits the star once every 37 days, NASA added in the release.

NASA在新聞稿中補充說，TOI 700d是太陽系中已知的最外層行星，比地球大20%左右，每37天繞恒星運行一周。