Astronomy and Cosmology

3685 topics in this forum

1. controllable universe?

   By Danijel Gorupec, May 28, 2022
   • 8 replies
   • 1k views
   • 
   • beecee
   • May 29, 2022

2. They report their independent image reconstruction of the M87 from the public data of the EHTC. Their result is different from the image published by the EHTC.

   By keremspace, May 14, 2022
   • 3 replies
   • 720 views
   • 
   • keremspace
   • May 14, 2022

3. Does our moon affect Earth's core

   By Kurious12, May 1, 2022
   • 21 replies
   • 3.1k views
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   • Kurious12
   • May 9, 2022

4. What dictates the size of a star?

   By Kurious12, April 29, 2022
   • 13 replies
   • 1.3k views
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   • swansont
   • July 12, 2022

5. what is the value of the acceleration of the expansion of the universe?

   By stephaneww, April 28, 2022
   • 0 replies
   • 544 views
   • 
   • stephaneww
   • April 28, 2022

6. Is Destiny’s ‘syzygy’-‘god wave’ concept scientifically plausible?

   By Fanghur, April 17, 2022
   • 1 reply
   • 728 views
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   • exchemist
   • April 17, 2022

7. Where no man has gone before

   By Gian, April 3, 2022
   • 2 replies
   • 678 views
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   • Genady
   • April 3, 2022

8. Please delete this post

   By icarus2, March 23, 2022
   • 1 reply
   • 652 views
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   • Phi for All
   • March 23, 2022

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

   By 34student, February 11, 2022
   • 83 replies
   • 8.5k views
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   • Mordred
   • December 27, 2022

10. The Copernican principle

    By __Ben__, January 28, 2022
    • 13 replies
    • 1.2k views
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    • Johnmo89
    • February 4, 2022

11. Closed Dyson sphere : is it really impossible ?

    By Edgard Neuman, January 24, 2022
    • 18 replies
    • 1.5k views
    • 
    • Edgard Neuman
    • January 30, 2022

12. Cosmological redshift, another thought experiment

    By Genady, January 20, 2022
    • 4 replies
    • 545 views
    • 
    • Genady
    • January 20, 2022

13. Jobs

    By EdenFechter, January 18, 2022
    • 0 replies
    • 558 views
    • 
    • EdenFechter
    • January 18, 2022

14. We and cosmic scales

    By Genady, January 18, 2022
    • 6 replies
    • 761 views
    • 
    • iNow
    • January 19, 2022

15. Cosmological redshift, thought experiment

    By Genady, January 16, 2022
    • 18 replies
    • 946 views
    • 
    • MigL
    • January 18, 2022

16. Can Sirius go supernova?

    By Kevin_Hall, January 13, 2022
    • 3 replies
    • 2.1k views
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    • SergUpstart
    • January 26, 2022

17. Living away from earth (split from Mars gravity issue) 1 2

    By mistermack, January 12, 2022
    • 28 replies
    • 2.6k views
    • 
    • mistermack
    • August 7, 2022

18. Mars gravity issue

    By Kevin_Hall, January 10, 2022
    • 15 replies
    • 1.4k views
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    • DaviBrons
    • January 24, 2022

19. Is it easy to shade the Earth for cooling? 1 2

    By Kevin_Hall, January 6, 2022
    • 26 replies
    • 1.9k views
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    • mistermack
    • January 8, 2022

20. Orion below the horizon? Where am I going wrong please?

    By wotsallthis, January 6, 2022
    • 4 replies
    • 785 views
    • 
    • wotsallthis
    • January 21, 2022

21. Does space have mass ? If not, how does it accelerate ?

    By Marius, January 4, 2022
    • 20 replies
    • 1.2k views
    • 
    • swansont
    • January 5, 2022

22. Rocket fuel

    By Kevin_Hall, January 4, 2022
    • 8 replies
    • 774 views
    • 
    • Ken Fabian
    • January 6, 2022

23. Start of time ?

    By Genady, January 4, 2022
    • 9 replies
    • 733 views
    • 
    • Markus Hanke
    • January 6, 2022

24. The Universe's First Molecule Found:

    By beecee, January 3, 2022
    • 4 replies
    • 617 views
    • 
    • exchemist
    • January 3, 2022

25. What is the mechanism for the BIG BANG ?

    By Marius, January 3, 2022
    • 13 replies
    • 743 views
    • 
    • Ghideon
    • January 3, 2022