Supernova remnant

Supernova remnant

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Credit: EUROPEAN SPACE AGENCY/SCIENCE PHOTO LIBRARY

Restrictions: This image may not be used to state or imply ESA endorsement of any company or product THIS PICTURE MAY NOT BE USED TO STATE OR IMPLY ESA ENDORSEMENT OF ANY COMPANY OR PRODUCT

Caption: Supernova remnant. X-ray image of supernova remnant (SNR) G21.5-0.9. An SNR is the expanding shell of material ejected by a supernova, a huge explosion that occurs when a massive star runs out of nuclear fuel. It emits X-rays as it becomes heated during ejection. The source seen at lower right (green) is thought to be a foreground binary system containing two stars held in orbit around each other. The G21.5-0.9 data are a calibration source for X-ray observations made by the European Space Agency XMM-Newton satellite, launched in 1999.

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Keywords: astronomy, astrophysics, be star, cosmology, esa, european space agency, g21.5-0.9, satellite data, science, snr, spectral type b, star death, stellar, supernova remnant, x-ray binary, x-ray image, xmm-newton x-ray observatory, xray

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