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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.

1,477 topics in this forum

  1. Momentum of systems

    By DimSon,
    • 2 replies
    • 465 views

  2. Humanoid Aliens? 1 2

    By Moontanman,
    • 18 replies
    • 749 views

  3. A Realistic Planet with 3 Moons

    By jmhuff,   
    • 1 reply
    • 165 views

  4. Planetary Defense: Shielding Earth from Asteroids

    By PanopticPerceptions,   
    • 1 reply
    • 185 views

  5. At What Altitude Can Stars Be Seen In Daylight? 1 2

    By spartan45,
    • 22 replies
    • 11k views

  6. I just seen a star disappear? 1 2 3 4 5

    By geko,
    • 70 replies
    • 98.9k views

  7. Time dilation and Hawkins radiation.

    By Jomazing,   
    • 15 replies
    • 780 views

  8. Entire Galaxy Destroying Kardashev Scale 4 Weapon

    By Vmedvil,
    • 4 replies
    • 566 views

  9. An Analysis Of The Big Bang

    By ClaudeGaiven,
    • 8 replies
    • 2.4k views

  10. Hycean Planets

    By Moontanman,
    • 2 replies
    • 356 views

  11. We are not alone. aliens are among us

    By atomsmasher,
    • 10 replies
    • 720 views

  12. The things that have been told to me

    By bitdaddy,
    • 2 replies
    • 379 views

  13. Black Hole Warheads for Defense of Earth Against Hostile UFOs/UAPs

    By Vmedvil,
    • 2 replies
    • 550 views

  14. The carbon coated coin (Eden Shorthouse)

    By Edenjs,
    • 0 replies
    • 388 views

  15. Mars and the dim sun paradox

    By Moontanman,
    • 2 replies
    • 426 views

  16. What is needed to creat Proton?

    By Dandav,
    • 3 replies
    • 930 views

  17. Why Neutron star isn't called Proton star

    By Dandav,
    • 4 replies
    • 784 views

  18. Time Travel Suggestions 1 2

    By Vmedvil2,
    • 21 replies
    • 7.1k views

  19. What is Dark Matter and Dark Energy?

    By Vmedvil5,
    • 0 replies
    • 1.1k views

  20. Tipler Cylinders And The Temporal Paradox Device

    By Vmedvil2,
    • 3 replies
    • 1k views

  21. Where is Webb?

    By ArthurSmith,
    • 1 reply
    • 1.2k views

  22. Could an extra creasing in space time offer a better fit for dark matter and dark energy.

    By highdimensionman,
    • 2 replies
    • 856 views

  23. Origin of The Universe

    By Mayukh,
    • 2 replies
    • 1.2k views

  24. IS SPACE DISCRETE?

    By write4u,
    • 11 replies
    • 1.4k views

  25. Nuclear Reheat And Mars Terraformation

    By Vmedvil2,
    • 8 replies
    • 1.6k views
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