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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.

1,485 topics in this forum

  1. Space Launch Thread

    By Buffy,
    • 1 reply
    • 1.3k views

  2. Dark Matter Translation

    By petrushkagoogol,
    • 1 reply
    • 1.6k views

  3. New: Earth-Like Exoplanet Found Orbiting The Star Ross 128

    By alfa015,
    • 3 replies
    • 1.9k views

  4. Mars First, Then Asteroid Belt

    By Eclipse Now,   
    • 0 replies
    • 2.5k views

  5. Effect Of A Retrograde Earth

    By petrushkagoogol,
    • 6 replies
    • 1.7k views

  6. Interstellar Navigation

    By Maine farmer,
    • 1 reply
    • 1.8k views

  7. Time Travel : Space Time Pin Pointing

    By LewisTheBrindley,   
    • 1 reply
    • 3.6k views

  8. How To Build A Time Machine 1 2 3 4

    By TomKalbfus,
    • 57 replies
    • 10.6k views

  9. Gravitational Singularity 1 2 3 4

    By hazelm,
    • 53 replies
    • 8.9k views

  10. Just A Short Meteor Quiz

    By Deepwater6,
    • 0 replies
    • 1.4k views

  11. Dynamic Dark Energy

    By hazelm,
    • 8 replies
    • 2.2k views

  12. Elon Musk With New Spacex Tech Says Costs Will Drop By A Factor Of 100 1 2

    By TomKalbfus,   
    • 24 replies
    • 5.1k views

  13. Terraforming Venus 1 2 3

    By Moontanman,
    • 39 replies
    • 10.4k views

  14. Zubrin Critiques Elon's Mars Plan

    By Eclipse Now,
    • 9 replies
    • 4.1k views

  15. From Whence Comes Gold?

    By hazelm,
    • 8 replies
    • 2.8k views

  16. Does "magmatter" Exist?

    By TomKalbfus,
    • 2 replies
    • 2.9k views

  17. Lunar Hotel

    By TomKalbfus,   
    • 2 replies
    • 1.8k views

  18. Making The Moon Into A Bernal Sphere

    By CraigD,
    • 1 reply
    • 3.4k views

  19. Tidally Lock Venus To Partially Terraform?

    By Eclipse Now,
    • 1 reply
    • 2.1k views

  20. Colonize Mercury 1 2

    By moonguy,
    • 19 replies
    • 7.6k views

  21. Is It An Asteroid Or A Comet? Or A Future Planet?

    By hazelm,
    • 0 replies
    • 1.4k views

  22. Another Source Of Cosmic Rays 1 2

    By hazelm,
    • 25 replies
    • 4.2k views

  23. Does a shadow have mass? 1 2 3 4

    By Zohaar818,
    • 52 replies
    • 28.5k views

  24. 2017 Eclipse 1 2

    By Deepwater6,
    • 28 replies
    • 4.9k views

  25. Eclipse In St Louis Area

    By hazelm,
    • 2 replies
    • 1.5k views
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