Supernova Refsdal and Galaxy Cluster MACS J1149.5+2223
This image composite shows the search for the supernova nicknamed Refsdal using NASA's Hubble Space Telescope.
The image to the left shows a part of the deep-field observation of the galaxy cluster MACS J1149.5+2223 from the Frontier Fields program. The circle indicates the predicted position of the newest appearance of the supernova. To the lower right, the Einstein Cross event from late 2014 is visible.
The image on the top right shows observations by Hubble from October 30, 2015, taken at the beginning of the observation program to detect the newest appearance of the supernova.
The image on the lower right shows the discovery of the Refsdal supernova on December 11, 2015, as predicted by several different models.
NASA, ESA, and P. Kelly (University of California, Berkeley);
Acknowledgment: NASA, ESA, and S. Rodney (University of South Carolina) and the FrontierSN team; T. Treu (UCLA), P. Kelly (UC Berkeley) and the GLASS team; J. Lotz (STScI) and the Frontier Fields team; M. Postman (STScI) and the CLASH team; and Z. Levay (STScI)