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Astronomy and Cosmology

Topics related to observation of space and any related phenomena.


3712 topics in this forum

  1. Gravity

    • 23 replies
    • 3.8k views
    • 14 replies
    • 3k views
    • 6 replies
    • 1.7k views
  2. Antimatter 1 2

    • 38 replies
    • 4.7k views
  3. Astronaut Farmers?

    • 0 replies
    • 831 views
  4. Orbits

    • 23 replies
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    • 8 replies
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    • 42 replies
    • 5k views
    • 4 replies
    • 928 views
  5. Ch-ch-changes

    • 4 replies
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    • 21 replies
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    • 4 replies
    • 1.1k views
    • 6 replies
    • 1.4k views
  6. Shrinking Sun

    • 6 replies
    • 1.4k views
    • 1 reply
    • 956 views
    • 5 replies
    • 1.1k views
  7. coexisting hypotheses

    • 19 replies
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    • 8 replies
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    • 1.4k views
  8. Galaxies

    • 8 replies
    • 2k views
  9. Vacuum Question

    • 7 replies
    • 1.2k views
    • 14 replies
    • 1.9k views
    • 10 replies
    • 1.7k views
  10. blackholes

    • 9 replies
    • 1.8k views
  11. Astronomy

    • 3 replies
    • 1.1k views
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