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For a star to explode as a supernova it problably starts out with a mass of at least 10 times of our sun.  It evolves into a red supergiant.  Unless it loses a large amount of its mass, the star becomes unable to resist the force of gravity, the core collapses, blowing the star apart.

To view the details on each supernova/remnant, including how I imaged it, just click on the name or the image.

Messier 1

"Crab Nebula"

Supernova

SN1999A

in NGC 1637

All the images in this site are Copyright 1999-2014 by Kevin Hearst.
Commercial use of these images without the prior written consent or knowledge of the author is strictly prohibited..