Supernova remnant

Supernova remnant

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Caption: Supernova remnant Cassiopeia A. Coloured X-ray image of shells of gas expanding from the supernova remnant Cassiopeia A (Cas A). Colours represent the intensity of X-ray emission, from green (lowest) to magenta (highest). Cas A is the remains of a star which exploded around 300 years ago. The outrushing gas is colliding with the inter-stellar medium, heating it to around 50 million degrees Celsius and causing it to emit X- rays. 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, snr, star death, stellar, supernova remnant, x-ray astronomy, xray

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