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

    By Nightlights646,
    • 1 reply
    • 352 views

  2. Missing pulsar problem (MPP)

    By Dandav,
    • 15 replies
    • 1.6k views

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

    By geko,
    • 74 replies
    • 106.9k views

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

    By oldpaddoboy,
    • 10 replies
    • 3.9k views

  5. Webb detects most distant black hole merger to date

    By oldpaddoboy,
    • 1 reply
    • 776 views

  6. The JWST and Supernova 1987A

    By oldpaddoboy,
    • 10 replies
    • 1.1k views

  7. Primordial Black Hole Capture by Neutron Stars:

    By oldpaddoboy,
    • 0 replies
    • 590 views

  8. Origin of asteroids

    By Moontanman,
    • 8 replies
    • 1.2k views

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

    By Vmedvil,
    • 1 reply
    • 810 views

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

    By Vmedvil,
    • 65 replies
    • 8.5k views

  11. An Analysis Of The Big Bang

    By ClaudeGaiven,
    • 9 replies
    • 3.3k views

  12. 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
    • 1k views

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

    By sunglasses25,
    • 5 replies
    • 1.5k views

  14. The mechanism of comet formation

    By Fermer1959,
    • 0 replies
    • 717 views

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

    By Vmedvil,
    • 5 replies
    • 1.4k views

  16. Nuclear Saltwater Rocket

    By Moontanman,
    • 2 replies
    • 851 views

  17. Momentum of systems

    By DimSon,
    • 2 replies
    • 1.4k views

  18. Humanoid Aliens? 1 2

    By Moontanman,
    • 18 replies
    • 3.1k views

  19. A Realistic Planet with 3 Moons

    By jmhuff,   
    • 1 reply
    • 847 views
    • Halc
    • Halc

  20. Planetary Defense: Shielding Earth from Asteroids

    By PanopticPerceptions,   
    • 1 reply
    • 888 views

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

    By spartan45,
    • 22 replies
    • 15.7k views

  22. Time dilation and Hawkins radiation.

    By Jomazing,   
    • 15 replies
    • 1.9k views

  23. Entire Galaxy Destroying Kardashev Scale 4 Weapon

    By Vmedvil,
    • 4 replies
    • 1.5k views

  24. Hycean Planets

    By Moontanman,
    • 2 replies
    • 1.4k views

  25. We are not alone. aliens are among us

    By atomsmasher,
    • 10 replies
    • 1.8k views
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