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Exceptionally rare sighting of planets colliding may shed light on the crash that formed the moon

Astronomers say a distant, sunlike star shows signs of a catastrophic planet-on-planet crash that may mirror the ancient impact that formed Earth's moon.
Space.com on MSN

'Completely bonkers': Astronomers find evidence of a cataclysmic collision between exoplanets

Astronomers have witnessed evidence of an extremely violent collision between planets, and it resembles the event in Earth's history that created the moon.