Two new rogue planets that do not orbit stars have been discovered

日期:2019-03-04 09:14:02 作者:娄喂玎 阅读:

ESO TWO new planets have been found drifting alone in our galaxy. One is among the smallest such objects we have seen, and it seems diminutive free-floating worlds may actually outnumber stars in the Milky Way. Exoplanets are usually spotted from the light dip seen as they pass in front of their star. But this does not work for planets without stars. Instead, anyone looking for wandering worlds must rely on a phenomenon called gravitational microlensing. This occurs when a planet’s gravity behaves like a lens,