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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.

1,486 topics in this forum

  1. Astronomers Find Dust in the Wind of Black Holes

    By Dr. Spitzer,
    • 0 replies
    • 1k views

  2. Peru 'meteorite' strike leaves 200 sick

    By Michaelangelica,
    • 1 reply
    • 1.3k views

  3. Big Bang Blasted 1 2 3 4 11

    By Eduffy80911,
    • 174 replies
    • 29.9k views

  4. Space Junk Re-entry Today?

    By EWright,
    • 1 reply
    • 1.4k views

  5. Out-of-the-box Travelling Space

    By Jet2,
    • 8 replies
    • 1.7k views
    • Jet2
    • Jet2

  6. Huge Galaxy Collision!!! 1 2 3

    By Dr. Spitzer,
    • 50 replies
    • 7.2k views

  7. Craters on Earth and the other Planets 1 2 3 4 5

    By Harry Costas,
    • 80 replies
    • 15.7k views

  8. Orbital Ratios

    By Jay-qu,
    • 3 replies
    • 1.6k views

  9. Great "Cosmic Nothingness" found 1 2

    By Hill,
    • 29 replies
    • 4.6k views

  10. Pioneer 10/11 Anomaly - New look

    By FrankM,
    • 1 reply
    • 1.3k views

  11. Space Tourism

    By freeztar,
    • 7 replies
    • 1.8k views

  12. Mirror Matter

    By Moontanman,
    • 15 replies
    • 2.4k views

  13. Plasma

    By Pluto,
    • 4 replies
    • 1.3k views

  14. Once flat always flat and reverse?

    By sanctus,
    • 6 replies
    • 1.3k views

  15. Classifying galaxies - citizen science

    By Hill,
    • 7 replies
    • 1.4k views

  16. Solar Flares 1 2 3

    By Mike C,
    • 39 replies
    • 5.5k views

  17. Comoving-physical coord. problem

    By sanctus,
    • 1 reply
    • 1k views

  18. SpaceShipOne...will they make it?

    By Tormod,
    • 7 replies
    • 2.9k views

  19. Elements formed in Big Bang not in stars or supernovae 1 2

    By scerri,
    • 25 replies
    • 3.2k views

  20. Where was the original supernova or other event that created our sun?

    By Megatron,
    • 1 reply
    • 1.1k views

  21. Open Letter About BBU

    By Mike C,
    • 4 replies
    • 1.1k views

  22. The Big Rip 1 2

    By johnhuey,
    • 32 replies
    • 4k views

  23. Finite or Infinite?

    By addicted-,
    • 10 replies
    • 1.8k views

  24. Space flight

    By btjunkie,
    • 1 reply
    • 1.2k views

  25. Colonizing Space 1 2 3

    By charles brough,
    • 34 replies
    • 5.9k views
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