天文学家利用地球和盖亚数据测量一个无赖行星的质量,发现它大约占木星质量的22%,很可能从行星系统中被抛出。 Astronomers used Earth and Gaia data to measure a rogue planet’s mass, finding it about 22% of Jupiter’s, likely ejected from a planetary system.

天文学家利用地球和已退役的盖亚空间天文台观测到的引力微透镜技术，测量了一颗流浪行星的质量——约为木星的22%，与土星相似。 Astronomers have measured the mass of a rogue planet—about 22% that of Jupiter and similar to Saturn’s—using gravitational microlensing observed from both Earth and the retired Gaia space observatory. 通过分析地球发光效应在两个地点的时间差,研究人员确定了其质量和距离,表明它可能在被抛射之前形成于行星系统之中。 By analyzing the timing difference of the planet’s light-bending effect from two locations, researchers determined its mass and distance, suggesting it likely formed in a planetary system before being ejected. 这一突破显示了研究自由漂浮的行星的新方法,这些行星本来难以探测。 This breakthrough demonstrates a new method for studying free-floating planets, which are otherwise difficult to detect. 预计即将到来的Nancy Grace Roman空间望远镜将大大增加此类发现。 The upcoming Nancy Grace Roman Space Telescope is expected to greatly increase such discoveries.