The Puppis A supernova remnant is one of the most intriguing and interesting objects in the sky. Slightly overlooked because it's partly hidden behind the nearer Vela remnant, it is the result of an explosion whose light reached Earth about 3,700 years ago. Since then, the bubble of shocked gas has expanded to a diameter of about 100
Swirling supernova's secret sibling
Nov 16, 2023
2 minutes
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