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Has our sun captured any extrasolar asteroids or comets?

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Comet 96P/Machholz, which has far less carbon than other comets. One possible reason for this is that it formed in a region with different elemental abundance than ours. There could be other explinations ( see this link Lowell Observatory) I suspect extra solar asteroids are rarer, because rocky objects are usually more tightly bound to stars, while comets seem to be pretty common in intersetllar space. read more

By the way, comets and asteroids have different names because of how they were first discovered. Comets have tails, and asteroids are named from the Greek “aster”, meaning star. Asteroids appeared like stars in early telescopes, as points of light. read more

This enormous gravitational niche is home to millions of objects, from planets and moons to comets, asteroids and meteoroids. One object differs from all the rest, like an "odd man out", as it were: asteroid (514107) 2015 BZ509. read more

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