Telescope captures the remnants of a supernova first seen 2,000 years ago
Some of the most dramatic events in the universe are supernovae, which happen either when massive stars run out of fuel and come to the end of their lives, or when a star in a binary feeds on its companion until it reaches a critical threshold. The star explodes outward in a huge outpouring of light and energy, which is bright enough to be seen from other galaxies but quickly fades....