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Astronomy and Space

Space, Human spaceflight, space probes and the exploration of our Solar System. No personal theories or speculation please.


1,481 topics in this forum

  1. How to talk to aliens 1 2 3 4

    • 62 replies
    • 12.4k views
  2. Terraforming Mars 1 2

    • 28 replies
    • 4.8k views
    • 1 reply
    • 1.5k views
  3. Walk up to the end????? 1 2

    • 31 replies
    • 4.3k views
    • 5 replies
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    • 29 replies
    • 6k views
    • 9 replies
    • 2.3k views
  4. Light Echos in Space

    • 1 reply
    • 1.1k views
  5. Project Andromeda

    • 0 replies
    • 2k views
  6. Free Lunch

    • 3 replies
    • 1.2k views
    • 0 replies
    • 3.1k views
  7. High winds?

    • 2 replies
    • 1.4k views
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    • 3.7k views
    • 14 replies
    • 4k views
  8. Space: STARS

    • 5 replies
    • 11.4k views
    • 2 replies
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    • 1 reply
    • 1.6k views
  9. Bent fourth dimension

    • 5 replies
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    • 8 replies
    • 1.5k views
  10. Dimensions? 1 2

    • 29 replies
    • 3.7k views
  11. Alien visitation 1 2

    • 18 replies
    • 4.1k views
  12. What IS space? 1 2 3 4 13

    • 214 replies
    • 29.6k views
    • 1 reply
    • 1.3k views
  13. A big question 1 2

    • 27 replies
    • 3.7k views
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