Astronomy and Cosmology

3708 topics in this forum

1. Mond beats Dark Matter

   By QuantumT, July 11, 2022
   • 19 replies
   • 2.5k views
   • 
   • Markus Hanke
   • July 23, 2022

2. Red Shift Question

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

3. What dictates the size of a star?

   By Kurious12, April 29, 2022
   • 13 replies
   • 1.5k views
   • 
   • swansont
   • July 12, 2022

4. Is the universe really 13.7 billion years old?

   By Kurious12, May 31, 2022
   • 12 replies
   • 2.2k views
   • 
   • Airbrush
   • July 11, 2022

5. An absurd search for dark matter

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

6. controllable universe?

   By Danijel Gorupec, May 28, 2022
   • 8 replies
   • 1.3k views
   • 
   • beecee
   • May 29, 2022

7. 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
   • 806 views
   • 
   • keremspace
   • May 14, 2022

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

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

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

   By Hello2, September 11, 2020
   • 8 replies
   • 1.8k views
   • 
   • beecee
   • April 17, 2022

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

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

11. Where no man has gone before

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

12. Please delete this post

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

13. Weight Loss during Solar Eclipse

    By Encryptor, October 16, 2017
    • 6 replies
    • 3k views
    • 
    • swansont
    • February 15, 2022

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

    By exchemist, December 30, 2021
    • 55 replies
    • 5.9k views
    • 
    • Airbrush
    • February 10, 2022

15. The Copernican principle

    By __Ben__, January 28, 2022
    • 13 replies
    • 1.6k views
    • 
    • Johnmo89
    • February 4, 2022

16. Closed Dyson sphere : is it really impossible ?

    By Edgard Neuman, January 24, 2022
    • 18 replies
    • 2.1k views
    • 
    • Edgard Neuman
    • January 30, 2022

17. Can Sirius go supernova?

    By Kevin_Hall, January 13, 2022
    • 3 replies
    • 2.7k views
    • 
    • SergUpstart
    • January 26, 2022

18. Mars gravity issue

    By Kevin_Hall, January 10, 2022
    • 15 replies
    • 1.8k views
    • 
    • DaviBrons
    • January 24, 2022

19. Dark matter 1 2 3 4 5

    By Kevin_Hall, December 21, 2021
    • 100 replies
    • 8.6k views
    • 
    • Genady
    • January 23, 2022

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

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

21. Cosmological redshift, another thought experiment

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

22. We and cosmic scales

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

23. Jobs

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

24. Cosmological redshift, thought experiment

    By Genady, January 16, 2022
    • 18 replies
    • 1.3k views
    • 
    • MigL
    • January 18, 2022

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

    By Kevin_Hall, January 6, 2022
    • 26 replies
    • 2.2k views
    • 
    • mistermack
    • January 8, 2022