A 171-Year-Old Planetary Mystery Just Took a Surprising Turn
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Coming up empty in a search for giant planets could help astronomers find smaller worlds in the habitable zones of the nearby two-star system 70 Ophiuchi AB. Two stars circling each other about 16 light-years from Earth have kept astronomers returning to a possibility first raised in 1855: that a planet might be orbiting nearby. [...]
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