Stephen’s Quintet even more amazing when Herschel and Newton combine with ground based observations. Thanks ESA! Image: ESA/XMM-Newton (X-rays); ESA/Herschel/PACS, SPIRE (infrared); SDSS (optical) From ESA: The Stephan’s Quintet of galaxies was discovered by astronomer Édouard Stephan in 1877. At the time, however, he reported the discovery of ‘new nebulae’, as the concept of other […]
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