Supernova Remnant of Cassiopeia A is the remnant of a once massive star that died in a violent supernova explosion 325 years ago. It consists of a dead star, called a neutron star, and a surrounding shell of material that was blasted off as the star died.

~~Supernova Remnant Cassiopeia A (NASA, Chandra) ~ for the first time, a multiwavelength three-dimensional (3-D) reconstruction of a supernova remnant has been created. This stunning visualization of Cassiopeia A (Cas A), the result of an explosion approximately 330 years ago by NASA's Marshall Space Flight Center~~

~~Supernova Remnant Cassiopeia A (NASA, Chandra) ~ for the first time, a multiwavelength three-dimensional (3-D) reconstruction of a supernova remnant has been created. This stunning visualization of Cassiopeia A (Cas A), the result of an explosion approximately 330 years ago by NASA's Marshall Space Flight Center~~

A new image taken with NASA's Hubble Space Telescope provides a detailed look at the tattered remains of a supernova explosion known as Cassiopeia A (Cas A). It is the youngest known remnant from a supernova explosion in the Milky Way. The new Hubble image shows the complex and intricate structure of the star's shattered fragments.

A new image taken with NASA's Hubble Space Telescope provides a detailed look at the tattered remains of a supernova explosion known as Cassiopeia A (Cas A). It is the youngest known remnant from a supernova explosion in the Milky Way. The new Hubble image shows the complex and intricate structure of the star's shattered fragments.

Cassiopeia A supernova remnant  NASA/JPL-Caltech/Oliver Krause (Steward Observatory)

Cassiopeia A supernova remnant NASA/JPL-Caltech/Oliver Krause (Steward Observatory)

Galaxies, Stars and Nebulae series Cuddle up to the stars with this gorgeous fleece blanket. It features Cassiopeia A, the youngest supernova remnant in the Milky Way. In beautiful colors that show astronomers what's going on, you can just focus on how lovely it looks :). Perfect for those star-gazing evening under the sky or to just snooze curled up on the sofa! image code: cassasn

Galaxies, Stars and Nebulae series Cuddle up to the stars with this gorgeous fleece blanket. It features Cassiopeia A, the youngest supernova remnant in the Milky Way. In beautiful colors that show astronomers what's going on, you can just focus on how lovely it looks :). Perfect for those star-gazing evening under the sky or to just snooze curled up on the sofa! image code: cassasn

Cassiopeia A (Cas A) is a supernova remnant in the constellation Cassiopeia and the brightest extrasolar radio source in the sky at frequencies above 1 GHz.    http://en.wikipedia.org/wiki/Cassiopeia_A

Cassiopeia A (Cas A) is a supernova remnant in the constellation Cassiopeia and the brightest extrasolar radio source in the sky at frequencies above 1 GHz. http://en.wikipedia.org/wiki/Cassiopeia_A

Supermoon Science: What Is A Supermoon Anyway? (PHOTOS)

Supermoon Science: What Is A Supermoon Anyway? (PHOTOS)

Exploded Star Detailed in New X-ray ImageCredit: NASA/CXC/GSFC/U.Hwang et al.In the new Chandra image of Cassiopeia A, gas billowing out from the supernova remnant is superheated, causing it to glow in X-rays. A reddish-colored jet of superfast matter can be seen shooting out of the upper left. A second jet, not notable in this image, was ferreted out in other data collected during the same observations.

Exploded Star Detailed in New X-ray ImageCredit: NASA/CXC/GSFC/U.Hwang et al.In the new Chandra image of Cassiopeia A, gas billowing out from the supernova remnant is superheated, causing it to glow in X-rays. A reddish-colored jet of superfast matter can be seen shooting out of the upper left. A second jet, not notable in this image, was ferreted out in other data collected during the same observations.

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