Rescued from a False Alarm: A Giant Planet in the Triple System KOI-1623
Every night the Kepler telescope stared at the same patch of sky, catching tiny dips in the light of distant stars. If a star blinked with clockwork precision, that could mean a planet was passing in front of it. But sometimes the blinking turned out to be a trick: light from two stars got mixed together, and astronomers filed the signal away in the false-alarm archive.