DAVID A. HARDY, FUTURES: 50 YEARS IN SPACE / SCIENCE PHOTO LIBRARY DAVID A. HARDY, FUTURES: 50 YEARS IN SPACE / SCIENCE PHOTO LIBRARY
Colliding galaxies seen from an inhabited alien world, artwork. Collisions between galaxies are fairly common. The collision distorts the shape of both galaxies, often casting off streamers of stars. Despite the fact that the galaxies may pass through each other, collisions between actual stars are exceedingly rare.
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