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Astronomy and Cosmology

Topics related to observation of space and any related phenomena.


3710 topics in this forum

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  1. The moon

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  2. Is a time machine possible? 1 2 3

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  3. Speed of a rocket

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  4. The Sun

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  5. Rhawn Joseph

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  6. Keplers Laws.

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  7. How do they know it?

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