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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.

1,487 topics in this forum

  1. This Is The New Way You Can Find Exoplanets From Home

    By alfa015,   
    • 4 replies
    • 2.2k views

  2. How Do You Think We Can Get To Proxima B?

    By alfa015,
    • 15 replies
    • 3.4k views

  3. Space Launch Thread

    By Buffy,
    • 1 reply
    • 1.4k views

  4. Dark Matter Translation

    By petrushkagoogol,
    • 1 reply
    • 1.6k views

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

    By alfa015,
    • 3 replies
    • 1.9k views

  6. Mars First, Then Asteroid Belt

    By Eclipse Now,   
    • 0 replies
    • 2.6k views

  7. Effect Of A Retrograde Earth

    By petrushkagoogol,
    • 6 replies
    • 1.8k views

  8. Interstellar Navigation

    By Maine farmer,
    • 1 reply
    • 1.9k views

  9. Time Travel : Space Time Pin Pointing

    By LewisTheBrindley,   
    • 1 reply
    • 3.7k views

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

    By TomKalbfus,
    • 57 replies
    • 10.9k views

  11. Gravitational Singularity 1 2 3 4

    By hazelm,
    • 53 replies
    • 9.2k views

  12. Just A Short Meteor Quiz

    By Deepwater6,
    • 0 replies
    • 1.4k views

  13. Dynamic Dark Energy

    By hazelm,
    • 8 replies
    • 2.2k views

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

    By TomKalbfus,   
    • 24 replies
    • 5.3k views

  15. Terraforming Venus 1 2 3

    By Moontanman,
    • 39 replies
    • 10.6k views

  16. Zubrin Critiques Elon's Mars Plan

    By Eclipse Now,
    • 9 replies
    • 4.3k views

  17. From Whence Comes Gold?

    By hazelm,
    • 8 replies
    • 2.9k views

  18. Does "magmatter" Exist?

    By TomKalbfus,
    • 2 replies
    • 3k views

  19. Lunar Hotel

    By TomKalbfus,   
    • 2 replies
    • 1.9k views

  20. Making The Moon Into A Bernal Sphere

    By CraigD,
    • 1 reply
    • 3.5k views

  21. Tidally Lock Venus To Partially Terraform?

    By Eclipse Now,
    • 1 reply
    • 2.2k views

  22. Colonize Mercury 1 2

    By moonguy,
    • 19 replies
    • 7.8k views

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

    By hazelm,
    • 0 replies
    • 1.4k views

  24. Another Source Of Cosmic Rays 1 2

    By hazelm,
    • 25 replies
    • 4.3k views

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

    By Zohaar818,
    • 52 replies
    • 29k views
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