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M81 and Macs J0025.4-1222

2 short videos from the Chandra website. Source- 0:00 M81 21-08-08 'This image of the mammoth spiral galaxy M81, located about 12 million light years away, contains data from four different NASA satellites.' 1:07 Macs J0025.4-1222 04-09-08 'Two galaxy clusters, each a quadrillion times the mass of the Sun, collided to form the system formally known as Macs J0025.4-1222.'
Length: 02:57


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