Through a lucky quirk of nature, astronomers have used the Hubble Space Telescope to view a single star halfway across the universe. Nine billion light years from Earth, the giant blue-white star, nicknamed “Icarus” by the team, is by far the most distant individual star ever seen.
Icarus is the farthest individual star ever seen. It is only visible because it is magnified by the gravity of a massive galaxy cluster, located about 5 billion light-years from Earth. The panels at right show the view in 2011, without Icarus visible, and the star’s brightening in 2016. (Hubble/STScI)