Astronomers have collected evidence of a violent collision between two planets in a distant star system. The first clues of this cataclysmic event came when a rather boring star began behaving very oddly. The collision seems to resemble the event in our history in which a planetary body slammed into Earth and created the moon.
The star in question is Gaia20ehk, an ordinarily stable main-sequence star like the sun located around 11,000 light-years away with a steady and predictable light output. Until 2016, that is, when something very strange started to happen."
