Simulations show that collisions between moons and planets may be a regular danger for possible extraterrestrial life.
The moon crashing into Earth may sound like an unrealistic doomsday scenario or the stuff of sci-fi disasters. But for some planets in other star systems, such catastrophic collisions may be common.
"We know of lots of moons in our own solar system, so naturally we'd expect to see moons in exoplanet systems," Jonathan Brande , a University of Kansas astrophysicist who was not associated with the new study, told Live Science in an email.
In his simulations, moons that wandered away from their host planets often returned with a bang, smashing into the planet and creating huge dust clouds. These dust clouds glowed in the infrared, as they were illuminated and warmed by the star's light. But they lasted only about 10,000 years before fading away — a cosmic blink of an eye.
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