SUPERNOVA REFSDAL AND GALAXY CLUSTER MACS J1149.5+2223
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...
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