Hyper-Velocity Stars Are Escaping Their Home Galaxies
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Key Facts In This Video
The star US 708 is moving at 745 miles per second (1,200 km/sec) toward intergalactic space. 00:25
US 708 may have originally been a red giant in a binary system with a white dwarf. 02:50
Astronomers analyze Type 1A supernovae to calculate how far away other galaxies are, and how fast they're moving. 03:49