How often do stars pass close (~1ly) to the Sun?

10yr ⋅

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What explains the distribution of new impact craters on Mars?

8yr ⋅

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Do sungrazing comets leave a field of meteoroids near the Sun?

9yr ⋅

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What makes small interferometers useful? Like NIRISS on JWST

9yr ⋅

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What places on Pluto and Charon are facing each other?

9yr ⋅

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Why do dark objects look white from a distance? (Moon, Ceres, but not Earth!)

9yr ⋅

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Is the Tombaugh Regio on Pluto visible from Earth?

9yr ⋅

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