Astronomy and Cosmology

3580 topics in this forum

1. Astronomy links 1 2 3 4 5

   By Martin, May 24, 2004
   • 105 replies
   • 94.4k views
   • 
   • swansont
   • June 25, 2021

2. Cosmological Principle 1 2 3

   By Mordred, May 30, 2015
   • 52 replies
   • 31.2k views
   • 
   • michel123456
   • June 22, 2020

3. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 25.8k views
   • 
   • swansont
   • August 3, 2018

4. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 19.1k views
   • 
   • Altruist1
   • March 26, 2016

5. Dark matter 1 2 3 4

   By Kevin_Hall, December 21, 2021
   • 97 replies
   • 1.8k views
   • 
   • Genady
   • 5 hours ago

6. James Webb Telescope and L2 Orbit Question 1 2

   By exchemist, December 30, 2021
   • 40 replies
   • 931 views
   • 
   • DaviBrons
   • 19 hours ago

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

   By wotsallthis, January 6
   • 4 replies
   • 156 views
   • 
   • wotsallthis
   • 23 hours ago

8. Cosmological redshift, another thought experiment

   By Genady, Thursday at 01:19 PM
   • 4 replies
   • 75 views
   • 
   • Genady
   • Thursday at 04:06 PM

9. We and cosmic scales

   By Genady, Tuesday at 05:17 PM
   • 6 replies
   • 115 views
   • 
   • iNow
   • Wednesday at 12:16 AM

10. Jobs

    By EdenFechter, Tuesday at 10:10 PM
    • 0 replies
    • 42 views
    • 
    • EdenFechter
    • Tuesday at 10:10 PM

11. Cosmological redshift, thought experiment

    By Genady, Sunday at 05:10 PM
    • 18 replies
    • 156 views
    • 
    • MigL
    • Tuesday at 04:53 PM

12. Living away from earth (split from Mars gravity issue)

    By mistermack, January 12
    • 14 replies
    • 224 views
    • 
    • mistermack
    • January 14

13. Can Sirius go supernova?

    By Kevin_Hall, January 13
    • 1 reply
    • 109 views
    • 
    • TheVat
    • January 13

14. Mars gravity issue

    By Kevin_Hall, January 10
    • 14 replies
    • 326 views
    • 
    • MigL
    • January 12

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

    By Kevin_Hall, January 6
    • 26 replies
    • 453 views
    • 
    • mistermack
    • January 8

16. Start of time ?

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

17. Rocket fuel

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

18. What is the mechanism for SPACE EXPANSION ?

    By Marius, January 2
    • 15 replies
    • 329 views
    • 
    • Phi for All
    • January 5

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

    By Marius, January 4
    • 20 replies
    • 254 views
    • 
    • swansont
    • January 5

20. "Our space is curved" 1 2

    By Genady, January 2
    • 33 replies
    • 405 views
    • 
    • Genady
    • January 3

21. The Universe's First Molecule Found:

    By beecee, January 3
    • 4 replies
    • 139 views
    • 
    • exchemist
    • January 3

22. What is the mechanism for the BIG BANG ?

    By Marius, January 3
    • 13 replies
    • 229 views
    • 
    • Ghideon
    • January 3

23. Happy New Year, astronauts!

    By Kevin_Hall, December 31, 2021
    • 0 replies
    • 99 views
    • 
    • Kevin_Hall
    • December 31, 2021

24. Dark Matter:

    By beecee, December 18, 2021
    • 6 replies
    • 286 views
    • 
    • MigL
    • December 23, 2021

25. Could the real size of the universe be infinite? 1 2 3

    By Strange Me, July 7, 2021
    • 71 replies
    • 2.7k views
    • 
    • skydelph
    • December 8, 2021