Astronomy and Cosmology

3403 topics in this forum

1. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 22579 views
   • 
   • swansont
   • August 3, 2018

2. Cosmological Principle 1 2

   By Mordred, May 30, 2015
   • 49 replies
   • 26014 views
   • 
   • YaDinghus
   • July 8, 2018

3. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 16316 views
   • 
   • Altruist1
   • March 26, 2016

4. Astronomy links 1 2 3 4 5

   By Martin, May 24, 2004
   • 102 replies
   • 86914 views
   • 
   • tinalay91
   • January 6, 2016

5. Tachyons and Superluminal motion:

   By beecee, Sunday at 08:43 PM
   • 6 replies
   • 112 views
   • 
   • Markus Hanke
   • 2 hours ago

6. Bootes void

   By Bmpbmp1975, 14 hours ago
   • 3 replies
   • 97 views
   • 
   • Ghideon
   • 10 hours ago

7. Is the Earth close to the center of the Universe ?

   By MaximT, January 16
   • 24 replies
   • 449 views
   • 
   • MigL
   • Yesterday at 01:23 AM

8. Apep

   By Bmpbmp1975, Sunday at 12:16 AM
   • 20 replies
   • 302 views
   • 
   • Bmpbmp1975
   • Sunday at 07:50 PM

9. Brown Dwarfs

   By Bmpbmp1975, Friday at 03:36 PM
   • 10 replies
   • 129 views
   • 
   • Airbrush
   • Sunday at 04:36 PM

10. Star older than universe

    By Bmpbmp1975, Friday at 02:27 AM
    • 9 replies
    • 207 views
    • 
    • dimreepr
    • Sunday at 01:38 PM

11. Betelguese dimming

    By Bmpbmp1975, Saturday at 11:10 PM
    • 3 replies
    • 76 views
    • 
    • swansont
    • Sunday at 12:01 AM

12. Apep

    By Bmpbmp1975, Saturday at 11:45 PM
    • 1 reply
    • 71 views
    • 
    • swansont
    • Saturday at 11:58 PM

13. Dead galaxy questions 1 2 3 4 7

    By Bmpbmp1975, February 11
    • 156 replies
    • 7264 views
    • 
    • Phi for All
    • Saturday at 03:03 PM

14. The Way to See Behind The Moon

    By Ritzier, February 5
    • 2 replies
    • 159 views
    • 
    • Airbrush
    • Saturday at 06:18 AM

15. Biggest Cannon in the Universe 3c186

    By Airbrush, November 30, 2019
    • 6 replies
    • 522 views
    • 
    • Strange
    • February 11

16. Need help understanding what an alleged physicist is saying about Flat Earth

    By cisjd.del, January 31
    • 24 replies
    • 435 views
    • 
    • Markus Hanke
    • February 1

17. Big Bang and Dark Matter - doubts

    By ravell, January 27
    • 1 reply
    • 165 views
    • 
    • swansont
    • January 27

18. Rocket propulsion and economics (split from Solve the climate crisis: A thought experiment)

    By LaurieAG, January 24
    • 1 reply
    • 99 views
    • 
    • LaurieAG
    • January 24
19. The speed of propagation of gravity

    Topic was moved to forum Speculations

20. Do we have any way of taming dark matter?

    By Calebeano, January 18
    • 3 replies
    • 179 views
    • 
    • Endy0816
    • January 18

21. I finally found an accurate article on the speed of universal expansion 1 2 3

    By Angelo, January 10
    • 58 replies
    • 20297 views
    • 
    • MaximT
    • January 16

22. If there was a big bang 14 or so billion years ago and all mass

    By Angelo, January 7
    • 14 replies
    • 267 views
    • 
    • Mordred
    • January 8

23. Plants in Super Habitable Exoplanets Could Look Purple

    By alfa015, December 31, 2019
    • 11 replies
    • 222 views
    • 
    • Airbrush
    • January 4

24. Stellar engine

    By Curious layman, January 1
    • 15 replies
    • 470 views
    • 
    • J.C.MacSwell
    • January 3

25. What is dark matter?

    By KANDEL, December 26, 2019
    • 3 replies
    • 261 views
    • 
    • Airbrush
    • December 27, 2019