Supernova remnant

Supernova remnant

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Caption: Supernova remnant Cassiopeia A. Coloured X-ray image showing silicon ion concentration in the supernova remnant Cassiopeia A (Cas A). Colours represent the intensity of X-ray emission, from green (lowest) through magenta to yellow (highest). Cas A is the remains of a star which exploded as a supernova around 300 years ago. The shape of the silicon ion map suggests that the explosion was asymmetric. Silicon is produced in giant stars (more than 3 solar masses) close to the end of their lives. This image was made with the Chandra X-ray Observatory in Earth orbit.

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Keywords: astronomy, astrophysics, cas a, cassiopeia a, chandra imagery, chandra x-ray observatory, cosmology, explosion, gas cloud, science, silicon, snr, star death, stellar, supernova remnant, x-ray astronomy, xray

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