Video: The latest look at ‘first light’ from Chandra

NASA’s Chandra X-ray Observatory has captured many spectacular images of cosmic phenomena over its two decades of operations, but perhaps its most iconic is the supernova remnant Cassiopeia A.

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Tau.Neutrino said:

Video: The latest look at ‘first light’ from Chandra

NASA’s Chandra X-ray Observatory has captured many spectacular images of cosmic phenomena over its two decades of operations, but perhaps its most iconic is the supernova remnant Cassiopeia A.

more…

It’s …. It’s growing.

How old is it, by the way … According to wikipedia, nobody knows. Estimates for explosion date range from 1630 to 1680, with a best guess near 1667. “At any rate, no supernova occurring within the Milky Way has been visible to the naked eye from Earth since.”