Astronomy and Cosmology

3705 topics in this forum

1. Is this/Can this be the "obvious"answer to the DM conundrum?

   By beecee, August 14, 2018
   • 0 replies
   • 730 views
   • 
   • beecee
   • August 14, 2018

2. Is the Universe infinite? 1 2 3 4 16

   By dordle-loddle, August 1, 2017
   • 385 replies
   • 40.9k views
   • 
   • Strange
   • August 14, 2018

3. Galactic distribution of heavy elements

   By MarkE, December 11, 2017
   • 23 replies
   • 2.7k views
   • 
   • Cryptodiamond
   • August 13, 2018

4. Is Dark Matter really necessary?

   By Lazarus, July 27, 2018
   • 24 replies
   • 1.6k views
   • 
   • StringJunky
   • August 3, 2018

5. Is a soap bubble a valid analogy for the expansion of space?

   By Ghideon, August 1, 2018
   • 0 replies
   • 840 views
   • 
   • Ghideon
   • August 1, 2018

6. 103 minutes total lunar eclipse on July 27th 2018 - longest lunar eclipse this century.

   By koti, July 21, 2018
   • 0 replies
   • 585 views
   • 
   • koti
   • July 21, 2018

7. Dark Energy and Non-Conservative Forces 1 2 3

   By DLTherrien, July 6, 2018
   • 70 replies
   • 5k views
   • 
   • DLTherrien
   • July 21, 2018

8. Gravitational Wave Astronomy

   By Warped, July 19, 2018
   • 3 replies
   • 743 views
   • 
   • Mordred
   • July 20, 2018

9. Space-time distortion and thoughts

   By Newcomer, July 14, 2018
   • 1 reply
   • 773 views
   • 
   • Warped
   • July 17, 2018

10. Could gravitational waves reveal how fast our universe is expanding?

    By beecee, July 11, 2018
    • 9 replies
    • 1.1k views
    • 
    • Mordred
    • July 14, 2018

11. Matter and Antimatter

    By Done, July 11, 2018
    • 6 replies
    • 1.7k views
    • 
    • Eise
    • July 12, 2018

12. Fermi Paradox According to Fox News

    By Airbrush, July 1, 2018
    • 12 replies
    • 1.4k views
    • 
    • Airbrush
    • July 10, 2018

13. What is this moving light in the sky?

    By Jerry Wickey, September 5, 2013
    • 22 replies
    • 42.4k views
    • 
    • rangerx
    • July 7, 2018

14. The Nature of Spacetime:

    By beecee, July 6, 2018
    • 2 replies
    • 761 views
    • 
    • beecee
    • July 7, 2018

15. Light and the event horizon?

    By Butch, July 6, 2018
    • 2 replies
    • 953 views
    • 
    • Butch
    • July 6, 2018

16. A centre of mass of the Universe. 1 2 3

    By geordief, June 24, 2018
    • 70 replies
    • 7k views
    • 
    • Mordred
    • June 27, 2018

17. Expansion - No Added Energy Required

    By Much Ado, June 27, 2018
    • 1 reply
    • 692 views
    • 
    • J.C.MacSwell
    • June 27, 2018

18. Is this the Dark Matter Particle?

    By beecee, June 9, 2018
    • 14 replies
    • 1.5k views
    • 
    • YaDinghus
    • June 23, 2018

19. Black Holes Tutorial for lay people;

    By beecee, June 15, 2018
    • 5 replies
    • 821 views
    • 
    • beecee
    • June 15, 2018

20. Location of Pioneer 1 & 2

    By Nero, June 9, 2018
    • 23 replies
    • 2.2k views
    • 
    • swansont
    • June 15, 2018

21. Black Holes and/or Wormholes:

    By beecee, June 12, 2018
    • 2 replies
    • 842 views
    • 
    • beecee
    • June 15, 2018

22. Saturn's Formation and Early Evolution at the Origin of Jupiter's Massive Moons

    By T. McGrath, June 12, 2018
    • 4 replies
    • 1.1k views
    • 
    • beecee
    • June 13, 2018

23. Would this be the final confirmation re the Big Bang?

    By beecee, June 8, 2018
    • 5 replies
    • 1.1k views
    • 
    • beecee
    • June 9, 2018

24. Does the Oort Cloud protect us?

    By Hypercube, June 16, 2012
    • 24 replies
    • 6.6k views
    • 
    • MarkE
    • June 8, 2018

25. When did humans realize that there are another galaxies?

    By hamburger228, May 25, 2018
    • 5 replies
    • 831 views
    • 
    • Mordred
    • May 26, 2018