Astronomy and Cosmology

3686 topics in this forum

1. Does cosmic expansion ever end?

   By geordief, July 28, 2022
   • 7 replies
   • 823 views
   • 
   • Airbrush
   • August 14, 2022

2. Planetary atmospheres

   By Moontanman, August 10, 2022
   • 16 replies
   • 926 views
   • 
   • Moontanman
   • August 13, 2022

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

   By mistermack, January 12, 2022
   • 28 replies
   • 2.7k views
   • 
   • mistermack
   • August 7, 2022

4. Mond beats Dark Matter

   By QuantumT, July 11, 2022
   • 19 replies
   • 2.1k views
   • 
   • Markus Hanke
   • July 23, 2022

5. Red Shift Question

   By Fly135, July 21, 2022
   • 2 replies
   • 560 views
   • 
   • Fly135
   • July 23, 2022

6. What dictates the size of a star?

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

7. Is the universe really 13.7 billion years old?

   By Kurious12, May 31, 2022
   • 12 replies
   • 1.8k views
   • 
   • Airbrush
   • July 11, 2022

8. An absurd search for dark matter

   By Enteves, June 5, 2022
   • 1 reply
   • 636 views
   • 
   • swansont
   • June 5, 2022

9. controllable universe?

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

10. 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
    • 725 views
    • 
    • keremspace
    • May 14, 2022

11. Does our moon affect Earth's core

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

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

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

13. So there is no need for bigbang-theory?

    By Hello2, September 11, 2020
    • 8 replies
    • 1.6k views
    • 
    • beecee
    • April 17, 2022

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

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

15. Where no man has gone before

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

16. Please delete this post

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

17. Weight Loss during Solar Eclipse

    By Encryptor, October 16, 2017
    • 6 replies
    • 2.7k views
    • 
    • swansont
    • February 15, 2022

18. James Webb Telescope and L2 Orbit Question 1 2 3

    By exchemist, December 30, 2021
    • 55 replies
    • 5k views
    • 
    • Airbrush
    • February 10, 2022

19. The Copernican principle

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

20. Closed Dyson sphere : is it really impossible ?

    By Edgard Neuman, January 24, 2022
    • 18 replies
    • 1.6k views
    • 
    • Edgard Neuman
    • January 30, 2022

21. Can Sirius go supernova?

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

22. Mars gravity issue

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

23. Dark matter 1 2 3 4 5

    By Kevin_Hall, December 21, 2021
    • 100 replies
    • 7.2k views
    • 
    • Genady
    • January 23, 2022

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

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

25. Cosmological redshift, another thought experiment

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