Astronomers spotted the aftermath of a collision between two rocky bodies in a distant solar system. It's full of clues about our own young Solar System.
visited in 2011. The astronomers behind this study say that the objects that collided around HD 166191 were about the same size as Vesta, about 530 km in diameter. “The amount and rapidity of the increase in the infrared flux requires a catastrophic event, such as a collision between two large bodies occurring in the terrestrial zone,” the authors write in their paper.The collision generated a lot of heat and some of the material was vapourized.
Image of the HL Tau planet-forming disk taken with the Atacama Large Millimeter Array. Astronomers think that the dark lanes are where planets are forming. Credit: ALMA In our Solar System there were probably dozens of Moon-sized to Mars-sized rocky bodies in the inner Solar System. Astronomers think that the Moon formed when a protoplanet named Theia collided with the Earth. There were probably many more collisions, and the architecture of the inner Solar System is the result of that process.
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