天文学家发现有三个太阳的“过热”行星
天文学家发现有三个太阳的“过热”行星
A distant rocky exoplanet has gone one better than Tatooine, Luke Skywalker’s home planet on “Star Wars,” which is famously depicted as having two suns in its sky.
一颗遥远的岩石系外行星，比卢克·天行者在《星球大战》中有两个太阳家乡的塔图因(Tatooine)还要多一个。
Scientists from the Harvard Center for Astrophysics used NASA’s Transiting Exoplanet Satellite Survey (TESS) telescope to spot planet LTT 1445 A b and its three stars.
来自哈佛天体物理中心的科学家们，利用美国宇航局的“过渡外行星卫星调查”(TESS)望远镜观测了LTT 1445 A B行星及其三颗恒星。
“While the planet itself remains in what is probably a stable orbit around its star, that star also orbits, at greater distance, two sibling stars that are locked in close orbit around each other,” explained NASA, in a statement.
美国宇航局在一份声明中解释说：“虽然这颗行星本身仍处于一个稳定的围绕它的恒星运行的轨道上，但这颗恒星也在距离较远的轨道上运行，这两颗兄弟恒星彼此锁定在彼此的近轨道上。”
LTT 1445 A b is about 22 light-years from Earth. A light-year measures distance in space and equals 6 trillion miles.
LTT 1445 A B距离地球约22光年。一光年是测量太空中距离的单位，相当于于6万亿英里。
The planet is described as “overheated” by NASA, which notes that LTT 1445 A b is about 1.4 times the size of Earth. LTT 1445 A b’s parent star is LTT 1445 A.
美国宇航局称这颗行星“过热”，并指出LTT 1445 A B大约是地球大小的1.4倍，LTT 1445 A B的母星是LTT 1445 A。
“LTT 1445 A b takes only five days to go once around its star – a ‘year’ on this world,” said NASA.
美国国家航空航天局说：“LTT 1445A B只需五天时间就可以绕着它的恒星运行一圈，这是这个世界上的‘一年’。”
“Its scorchingly close orbit helps explain why its surface basks in temperatures on the order of 320 degrees Fahrenheit (160 Celsius) — comparable to a preheated oven.”
“它极近的轨道，有助于解释为什么它的表面温度能达到320华氏度(160摄氏度)——这与预热过的烤箱相当。”
This is not the first time that a planet with more than one star has been discovered. NASA notes that our nearest exoplanet neighbor, Proxima b, also has three stars in its sky. Proxima b orbits Proxima Centauri located 4.25 light-years from Earth, which in turn orbits Alpha Centauri A and B.
这不是第一次发现有一颗以上恒星的行星。美国宇航局注意到，我们最近的外行星邻居，Proxima b，在它的天空中也有三颗恒星。Proxima b绕着比邻星运行，比邻星距离地球4.25光年，比邻星又绕着半人马座阿尔法星A和b运行。
In 2016, experts from NASA’s Goddard Space Flight Center and San Diego University used the Kepler Space Telescope to spot Kepler-1647 b, a planet with two suns in the Cygnus Constellation.
2016年，来自美国宇航局戈达德太空飞行中心和圣地亚哥大学的专家，利用开普勒太空望远镜发现了开普勒-1647b，这颗行星位于天鹅座，有两个太阳。
