Wednesday , October 20 2021

About 900 years ago, astronomers saw a strange, bright light in the sky. We finally know what caused it.



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In the 12th century, Chinese and Japanese astronomers saw a new light in the sky shining as brightly as Saturn. They described it as a powerful stellar explosion known as a supernova and marked its approximate position in the sky – but the cause remained a mystery.

Now, astronomers say they’ve solved the 840-year-old riddle: Two extremely dense stars collided. Milky Way and caused a supernova. The explosion likely resulted in the formation of a sizzling star now known as Parker’s star and a nebula with an expanding shell of gas and dust called Pa 30.

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