Compass Image for Icarus (MACS J1149_2223 Lensed Star 1)
This graphic shows the location, orientation, and filters used to image MACS J1149+2223 Lensed Star 1, the farthest individual star ever seen. Called Icarus, this star is only visible because it is being magnified by the gravity of a massive galaxy cluster, located about 5 billion light-years from Earth. This cluster, called MACS J1149+2223 (shown at left) sits between the Earth and the galaxy that contains the distant star. The team had been using Hubble to monitor a supernova in the far-off spiral galaxy when, in 2016, they spotted a point of light near the supernova that began to brighten. Even though the object subsequently became three times brighter in one month, the colors of the light coming from the object did not change. Analysis of these colors showed it was a blue supergiant star in the background galaxy whose magnification grew for several weeks due to an intervening object, probably a star, in the galaxy cluster. The panels at the right show the view in 2011, without Icarus visible, compared with the star’s brightening in 2016.