CONUNDRUM. Astronomers have photographed one of the smallest objects (arrow) ever found orbiting an ordinary star beyond the solar system. Circling the young red dwarf star CHXR 73, the body weighs in at about 10 times the mass of Jupiter, small enough to be a planet but big enough to be a failed star called a brown dwarf.
Credit: Luhman, NASA, ESA
Found in: Astronomy
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