Mysterious rogue planet with no Sun detected flying through space

Astronomers have detected a newly discovered rogue planet navigating alone through the Milky Way, signifying the first time scientists have directly calculated the mass of a free-floating world. Found through a rare gravitational microlensing event monitored from Earth and a space telescope, the planet is measured to be about 22 percent the mass of Jupiter and situated approximately 10,000 light-years away.