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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.

1,484 topics in this forum

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

    By spartan45,
    • 24 replies
    • 17.1k views

  2. A mystery of black holes and Big-Bang, theory of black star and sizable body on the start of the universe

    By cpu68,
    • 3 replies
    • 704 views

  3. Star appeared out of nowhere was super bright then disappear last like 15-20 seconds

    By Nightlights646,
    • 1 reply
    • 619 views

  4. Missing pulsar problem (MPP)

    By Dandav,
    • 15 replies
    • 2k views

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

    By geko,
    • 74 replies
    • 108.7k views

  6. How to catch a glimpse of a new star about to appear in the night sky:

    By oldpaddoboy,
    • 10 replies
    • 4.2k views

  7. Webb detects most distant black hole merger to date

    By oldpaddoboy,
    • 1 reply
    • 1.1k views

  8. The JWST and Supernova 1987A

    By oldpaddoboy,
    • 10 replies
    • 1.4k views

  9. Primordial Black Hole Capture by Neutron Stars:

    By oldpaddoboy,
    • 0 replies
    • 791 views

  10. Origin of asteroids

    By Moontanman,
    • 8 replies
    • 1.5k views

  11. Solar Eclipse 2024: Pictures from Vmedvil in the Totality Zone

    By Vmedvil,
    • 1 reply
    • 1.1k views

  12. Are Humans the First Technologically Advanced Species in the Universe? 1 2 3 4

    By Vmedvil,
    • 65 replies
    • 9.9k views

  13. An Analysis Of The Big Bang

    By ClaudeGaiven,
    • 9 replies
    • 3.6k views

  14. Let's take two objects A and B at a different distance of about 29 million light years and are moving away at the rate of expansion similar to that of universe and a ray of light emitted by A toward B and the initial date of their positioning would reach

    By billywilliams,   
    • 3 replies
    • 1.3k views

  15. Top 5 Time Travel Movies : All Science Fiction Lovers Should Watch

    By sunglasses25,
    • 5 replies
    • 1.8k views

  16. The mechanism of comet formation

    By Fermer1959,
    • 0 replies
    • 931 views

  17. What if Humans Stored Nuclear Waste On Other Planets?

    By Vmedvil,
    • 5 replies
    • 1.6k views

  18. Nuclear Saltwater Rocket

    By Moontanman,
    • 2 replies
    • 1.1k views

  19. Momentum of systems

    By DimSon,
    • 2 replies
    • 1.8k views

  20. Humanoid Aliens? 1 2

    By Moontanman,
    • 18 replies
    • 3.6k views

  21. A Realistic Planet with 3 Moons

    By jmhuff,   
    • 1 reply
    • 1.1k views
    • Halc
    • Halc

  22. Planetary Defense: Shielding Earth from Asteroids

    By PanopticPerceptions,   
    • 1 reply
    • 1.1k views

  23. Time dilation and Hawkins radiation.

    By Jomazing,   
    • 15 replies
    • 2.2k views

  24. Entire Galaxy Destroying Kardashev Scale 4 Weapon

    By Vmedvil,
    • 4 replies
    • 1.7k views

  25. Hycean Planets

    By Moontanman,
    • 2 replies
    • 1.6k views
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