Something huge ripped the skin off this star before it died

[Admin]

Something pulled the outer layer of Cassiopeia A off before it detonated to form this gorgeous supernova. But what?

Something huge ripped the skin off this star before it died : Read more

 

[Ed Stauffer]

It would be nice if we had some premolar lensing data to compare to post nova lensing to see if there is any difference in dark matter distribution. Does it disperse once the gravity well is gone.