DAVID A. HARDY / SCIENCE PHOTO LIBRARY DAVID A. HARDY / SCIENCE PHOTO LIBRARY
Alien landscape. Artwork of a red dwarf star (orange) seen from inside a cave on the surface of a nearby alien planet. Stalactites (upper frame) and stalagmites (lower frame) have formed by precipitation within the cave. Red dwarf stars are thought to be the most common stars in the universe. They have similar properties to those of our Sun, but are cooler and smaller.
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