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Astronomy and Cosmology

Topics related to observation of space and any related phenomena.

3712 topics in this forum

  1. Can we create Micro Climate Craters on Mars by deflecting Comets? Need Peer Review

    By PhotonBytes,
    • 0 replies
    • 346 views

  2. Nature loves spirals

    By studiot,
    • 6 replies
    • 562 views

  3. What is the depth of the gravitational potential of the universe?

    By Halc,
    • 9 replies
    • 1.5k views

  4. How does the light from distant stars get to our eyes?

    By gib65,
    • 24 replies
    • 2.4k views

  5. Why is a fine-tuned universe a problem? 1 2 3 4

    By 34student,
    • 83 replies
    • 10.1k views

  6. Was the universe "dark" before the eyesight

    By vitttorrio,
    • 10 replies
    • 977 views

  7. Musings of a mad scientist (inflation as cosmological constant)

    By Mordred,
    • 0 replies
    • 549 views

  8. Mr

    By Edenjs,
    • 10 replies
    • 758 views

  9. Dark energy with negative and positive kinetic energy and the Big Rip

    By xX_minecraftMLGPRO2019_Xx,
    • 4 replies
    • 615 views

  10. Did the bing bang actually happen? 1 2 3

    By tmdarkmatter,
    • 50 replies
    • 3.3k views

  11. Hydrogen thermal equilibrium decoupling

    By Mordred,
    • 2 replies
    • 506 views

  12. Solar fusion, neutrinos and age of solar system

    By Sensei,
    • 10 replies
    • 2.9k views

  13. Revisiting the Kardashev Scale of Civilizations

    By Airbrush,
    • 0 replies
    • 511 views

  14. Will universe collapse?

    By vitttorrio,
    • 4 replies
    • 761 views

  15. Admiral Lord Nelson in Space

    By Gian,
    • 9 replies
    • 1.2k views

  16. Please, tell what objects

    By RomanRodinskiy,
    • 2 replies
    • 767 views

  17. The Total Perspective Vortex, Astrology and one small piece of fairy cake

    By Gian,
    • 22 replies
    • 2.4k views

  18. astrophotography

    By sddfds,
    • 1 reply
    • 848 views

  19. State of "matter" of a singularity 1 2 3 4 7

    By gatewood,
    • 157 replies
    • 13.9k views

  20. DART Mission

    By paulsutton,
    • 3 replies
    • 840 views

  21. Universal Expansion Alternative Theory

    By Charon,
    • 2 replies
    • 841 views

  22. Frank Drake (1930 - 2022)

    By toucana,
    • 1 reply
    • 805 views

  23. Big Bang theory 1 2 3

    By amshion,
    • 68 replies
    • 7.5k views

  24. I need help understanding something.

    By nonameyet,
    • 3 replies
    • 867 views

  25. are we trying to look out of a black hole when trying to look at the past of the big bang ?

    By raphaelh42,
    • 13 replies
    • 2k views
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