The Multiwavelength Crab

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Explanation: The Crab Nebula is cataloged as M1, the first object on Charles Messier’s famous list of things which are not comets. In fact, the Crab is now known to be a supernova remnant, expanding debris from massive star’s death explosion, witnessed on planet Earth in 1054 AD.

from Pocket https://apod.nasa.gov/apod/ap170511.html
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