Europa Images Challenge Crater Creation Theory

KER THAN

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Europa Images Challenge Crater Creation Theory

机译：欧罗巴图像挑战火山口创作理论

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A hole in a moon or planet does not always mean what astronomers thought. Most of the craters on Jupiter's moon Europa are formed by chunks of rock and ice splashing back down onto the moon's surface after a meteor strike, a new study suggests. It previously was thought that most of the craters seen on moons and planets were the work of direct, or "primary," impacts from asteroids and comets. The new finding suggests that most of those craters might instead be "secondaries," impacts that formed by the material ejected from primary impacts.

机译：月亮或行星上的孔并不总是意味着天文学家的想法。一项新的研究表明，木星月球欧罗巴上的大多数陨石坑是由流星撞击后溅落到月球表面的大块岩石和冰块形成的。以前，人们认为，在月亮和行星上看到的大多数陨石坑是小行星和彗星直接或“主要”撞击的产物。新的发现表明，这些陨石坑中的大多数可能是“次生”撞击，这是由主要撞击弹出的物质形成的撞击。

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《Space news》 |2005年第42期|p.20|共1页
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KER THAN;
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Europa Images Challenge Crater Creation Theory

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