Cluster of galaxies known as Abell 2256. Galaxy clusters are traditionally strong x-ray emitters. The emission originates in the hot gas which is swept out of colliding galaxies and accumulates between galaxies. The gases are typically tens of millions degrees in temperature. The German Roentgen Satellite (ROAST) captured this "first light" image as part of the satellite's orbital calibration and verification phase during June and July using NASA provided High Resolution Imager (HRI). ROAST is a joint international project involving Germany, the UK and the United States. Dated 20th century

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Photograph of a cluster of galaxies known as Abell 2256. Galaxy clusters are traditionally strong x-ray emitters. The emission originates in the hot gas which is swept out of colliding galaxies and accumulates between galaxies. The gases are typically tens of millions degrees in temperature. The German Roentgen Satellite (ROAST) captured this "first light" image as part of the satellite's orbital calibration and verification phase during June and July using NASA provided High Resolution Imager (HRI). ROAST is a joint international project involving the Federal Republic of Germany, the United Kingdom and the United States. Dated 20th century

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Size: 4595px × 4564px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

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