This does indeed happen in other solar systems, as a separate study shows. On Wednesday, astronomers using the cold-observing Spitzer space telescope described finding a dusty band around a star called Eta Corvi, a billion-year-old star system in the constellation Corvus, the crow. The band's contents strongly match that of an obliterated comet, suggesting a massive collision, perhaps with a planet. This sounded like what happened during Earth's own Late Heavy Bombardment. The system has a second, bigger ring much farther out, just like our own Kuiper Belt. And the bombardment is even happening around the same time that ours did, about a billion years after the Earth formed.