Check it out.
Some advice from Dr. BobJune 29, 2008
NIMBY Vela SupernovaJune 29, 2008
Oh sure, it’s all fun and games until the bloody sun blows up.
This image shows the devastation wrought when a star explodes. The Vela Supernova Remnant formed when a massive star 800 light years away blew up 11,000 years ago. Expanding at a ferocious velocity, it is now 8 degrees across in the sky — 16 times the apparent width of the Moon, and about the size of your outstretched fist! David’s mosaic shows a stunning amount of detail, tracing the variety of shapes and patterns the expanding gas makes as it slams into the interstellar junk floating around it.
From the always excellent Bad Astronomy Blog.