Astronomers have detected the smallest rogue planet in our Milky Way galaxy, and it's between the sizes of Mars and Earth. Rogue planets are free-floating planets that don't orbit stars.
원문출처 : https://www.cnn.com/2020/10/30/world/rogue-planet-milky-way-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/10/30/world/rogue-planet-milky-way-scn-trnd/index.html