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A Ring of Black Holes | NASA’s Marshall Space Flight Center

Composite image of Arp 147, a pair of interacting galaxies located about 430 million light years from Earth. Arp 147 contains the remnant of a spiral galaxy (right) that collided with the elliptical galaxy on the left. This collision has produced an expanding wave of star formation that shows up as a blue ring containing in abundance of massive young stars. These stars race through their evolution in a few million years or less and explode as supernovas, leaving behind neutron stars and black holes. (more)

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