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`Mysterious` X-ray signal could be dark matter candidate

Last Updated: Wednesday, June 25, 2014, 11:14

Researchers are mystified by a mysterious X-ray signal which has been found in a detailed study of galaxy clusters using NASA`s Chandra X-ray Observatory and ESA`s XMM-Newton.

Tycho`s supernova remnant lights up to Mach 1,000 shock wave

Last Updated: Tuesday, November 26, 2013, 20:47

Astronomers have discovered that a reverse shock wave racing inward at Mach 1,000 (1,000 times the speed of sound) is heating the remnant of Tycho`s supernova and causing it to emit X-ray light.

Tycho`s supernova remnant lights up to Mach 1,000 shock wave

Last Updated: Tuesday, November 26, 2013, 15:24

Astronomers have discovered that a reverse shock wave racing inward at Mach 1,000 (1,000 times the speed of sound) is heating the remnant of Tycho`s supernova and causing it to emit X-ray light.