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Puppis A
Dec. 9, 2011

Puppis A
Dec. 9, 2011
Title : Ancient Supernova Revealed
Description : About 3,700 years ago, people on Earth would have seen a brand-new bright star in the sky. As it slowly dimmed out of sight, it was eventually forgotten, until modern astronomers found its remains -- called Puppis A . Seen as a red dusty cloud in this image from NASA’s Wide-field Infrared Survey Explorer, or WISE, Puppis A is the remnant of a supernova explosion.

Puppis A (pronounced PUP-pis) was formed when a massive star ended its life in an extremely bright and powerful explosion. The expanding shock waves from that explosion are heating up the dust and gas clouds surrounding the supernova, causing them to glow and creating the beautiful red cloud we see here. Much of the material from that original star was violently thrown out into space. However, some of the material remained in an incredibly dense object called a neutron star. This particular neutron star (too faint to be seen in this image) is moving inexplicably fast: over 3 million miles per hour! Astronomers are perplexed over its absurd speed, and have nicknamed the object, the “Cosmic Cannonball."

Some of the green-colored gas and dust in the image is from yet another ancient supernova -- the Vela supernova remnant. That explosion happened around 12,000 years ago and was four times closer to us than Puppis A. If you had X-ray vision like the comic book hero Superman, both of these remnants would be among the largest and brightest objects you would see in the sky.

This image was made from observations by all four infrared detectors aboard WISE. Blue and cyan (blue-green) represent infrared light at wavelengths of 3.4 and 4.6 microns, which is primarily from stars, the hottest objects pictured. Green and red represent light at 12 and 22 microns, which is primarily from warm dust.
Date : Dec. 9, 2011
Credit : NASA/JPL-Caltech/UCLA/WISE Team
Source : UC Berkeley
File Type : JPG
File Size : 24.2MB


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