Space Photos of the Week: Dead Stars and a Cute L’il Comet

This ghostly image captures a death. The red filaments of gas are remnants of a supernova explosion called HBH 3. Astronomers think it happened anywhere between 80,000 and 1 million years ago, and these markers stretch 150 light years across—among the largest supernova remnants ever discovered. And while the red leftovers are within our galaxy, …

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