The newly-discovered core-collapse supernova, or Type II supernova, seen at a lookback time of approximately 11.5 billion years, is strongly lensed by a member galaxy in the massive galaxy cluster Abell 370. The radius of the exploded star is estimated to be 533 times the radius of the Sun, consistent with a red supergiant. A multiply imaged supernova in the archival Hubble imaging of the Abell 370 galaxy-cluster field. Image credit: Chen et...