RONALD ROYER / SCIENCE PHOTO LIBRARY RONALD ROYER / SCIENCE PHOTO LIBRARY
Optical photograph of the Perseus double star cluster, with chi Persei (left centre) & h Persei (right centre), in the constellation of Perseus. Located some 7100 light years from Earth, & separated by 50 light years from each other, the clusters are an estimated 10-20 million years old. Ekta 64 x 2.
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