November 21
Galaxy Cluster MACS J1149.6+2223
Observed in 2014
This massive cluster of galaxies is MACS J1149.6+2223. In this image, light from a distant supernova appears in four different places. The multiple supernova images are created as the exploding star's light is bent by the powerful gravity of a large galaxy in the cluster.
Image credit: NASA, ESA, Hubble Space Telescope