This is one of the few supernovae humans have been able to see with their naked eyes throughout history, and scientists might finally know what caused it.
from gizmodo http://www.gizmodo.co.uk/2017/09/a-famous-supernovas-mysteries-are-still-unraveling-hundreds-of-years-later/
from gizmodo http://www.gizmodo.co.uk/2017/09/a-famous-supernovas-mysteries-are-still-unraveling-hundreds-of-years-later/
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