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Click the image to see the NASA page.

About 11,000 years ago, a star in the constellation Vela exploded, creating a flash of light briefly visible to humans living near the beginning of our recorded history. The outer layers of the star collided into interstellar gas and dust, driving a shock wave still visible today, as you can see in the photo above. The resulting dramatic nebula spans almost 100 light years and appears 20 times the diameter of the full Moon from our POV. As gas rockets away from the exploded star, it decays and reacts with the interstellar stuff around it, producing light in many colors and energy bands. At the center of the Vela Supernova Remnant glows a pulsar, a star as dense as matter can get, which rotates more than ten times per second.




( 3 comments — Leave a comment )
Jan. 25th, 2013 07:26 pm (UTC)
That's gorgeous!

Earlier this week, Dean & I walked outside and noticed a perfect ring around the moon, at about half the distance to the horizon. I'd never noticed one that far away from it before.

It was so beautiful, and then I got mad, because we don't have an camera with a timed exposure!
Jan. 28th, 2013 04:06 pm (UTC)
Wow, I know exactly what you mean! Those are SO DRAMATIC! Lots of ice in the upper atmosphere.
Jan. 26th, 2013 08:16 am (UTC)
WOW!!!! that is SO pretty!!
( 3 comments — Leave a comment )