The Hubble Space Telescope has discovered a galaxy in the the Perseus galaxy cluster that is "composed of 99% dark matter," ...

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Chandra X-ray Observatory observations of the Perseus galaxy cluster's black hole and M87's jet have been turned into sound ...

In its brief time gathering data this year, the Hitomi X-ray Observatory discovered something quite serene: the calm core in a massive cluster of galaxies. Scientists from the international Hitomi ...

Is there sound in space? New audio released from NASA provides some insight – and the answer is haunting. The audio, released on May 4, is that of a black hole from the center of the Perseus galaxy ...

January 8 opens with the icy moon Europa and its shadow transiting the disk of Jupiter. The two move across the disk from east to west until the shadow disappears from the eastern limb by 2:30 A.M.