Astronomy and Cosmology

3685 topics in this forum

1. Planetary atmospheres

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

2. 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

3. Mond beats Dark Matter

   By QuantumT, July 11, 2022
   • 19 replies
   • 2k views
   • 
   • Markus Hanke
   • July 23, 2022

4. Red Shift Question

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

5. What dictates the size of a star?

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

6. Is the universe really 13.7 billion years old?

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

7. An absurd search for dark matter

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

8. controllable universe?

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

9. 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
   • 712 views
   • 
   • keremspace
   • May 14, 2022

10. Does our moon affect Earth's core

    By Kurious12, May 1, 2022
    • 21 replies
    • 3k views
    • 
    • Kurious12
    • May 9, 2022

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

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

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

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

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

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

14. Where no man has gone before

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

15. Please delete this post

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

16. Weight Loss during Solar Eclipse

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

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

    By exchemist, December 30, 2021
    • 55 replies
    • 4.9k views
    • 
    • Airbrush
    • February 10, 2022

18. The Copernican principle

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

19. Closed Dyson sphere : is it really impossible ?

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

20. Can Sirius go supernova?

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

21. Mars gravity issue

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

22. Dark matter 1 2 3 4 5

    By Kevin_Hall, December 21, 2021
    • 100 replies
    • 7.1k views
    • 
    • Genady
    • January 23, 2022

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

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

24. Cosmological redshift, another thought experiment

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

25. We and cosmic scales

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