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Astronomy and Cosmology

Topics related to observation of space and any related phenomena.


3709 topics in this forum

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  1. New to Astronomy

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  2. time and space 1 2

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  3. Most Distant Object

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  4. anti time

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  5. Colliding satellites

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  6. Plasma

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  7. Venus...

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  8. Big Bang at t<0

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  9. what is a black hole?

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  10. blue shift galaxies

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