Astronomy and Cosmology

3688 topics in this forum

1. A habitable Planet... 1 2 3

   By Aigbusted, November 10, 2007
   • 60 replies
   • 7.8k views
   • 
   • Airbrush
   • March 11, 2016

2. What is space? 1 2 3

   By Dr. Funkenstein, June 12, 2014
   • 54 replies
   • 7.8k views
   • 
   • matterdoc
   • August 7, 2014

3. What are the explanations for greater than C space-time expansion? 1 2

   By wucko, May 9, 2012
   • 47 replies
   • 7.8k views
   • 
   • Markus Hanke
   • February 6, 2021

4. Where are we 1 2 3 4

   By 36grit, December 1, 2016
   • 75 replies
   • 7.7k views
   • 
   • Berj / KI3U
   • January 5, 2017

5. Location of Big Bang? 1 2 3 4

   By mustang292, March 12, 2005
   • 96 replies
   • 7.7k views
   • 
   • Cadmus
   • March 17, 2005

6. Cold spot and parallel universe 1 2 3

   By Bmpbmp1975, April 10, 2020
   • 55 replies
   • 7.7k views
   • 
   • Bmpbmp1975
   • April 15, 2020

7. Dark Energy, Dark Matter and Antigravity

   By Done, November 23, 2013
   • 6 replies
   • 7.7k views
   • 
   • hoola
   • December 19, 2013

8. Why is Moon so round and spinless?

   By Inquisitor, March 27, 2009
   • 19 replies
   • 7.6k views
   • 
   • Sisyphus
   • March 30, 2009

9. Planetary orbits?

   By YT2095, November 11, 2004
   • 24 replies
   • 7.4k views
   • 
   • J.C.MacSwell
   • February 10, 2005

10. Curvature caused by Photons too ? 1 2 3

    By Widdekind, January 3, 2011
    • 56 replies
    • 7.4k views
    • 
    • Widdekind
    • January 25, 2012

11. Space expanding FTL 1 2 3

    By BlackHole, March 17, 2005
    • 66 replies
    • 7.4k views
    • 
    • Spyman
    • April 6, 2005

12. Dark matter 1 2 3 4 5

    By Kevin_Hall, December 21, 2021
    • 100 replies
    • 7.3k views
    • 
    • Genady
    • January 23, 2022

13. How can the universe be infinite in size? 1 2 3

    By Airbrush, December 17, 2012
    • 52 replies
    • 7.2k views
    • 
    • Spyman
    • January 14, 2013

14. Strange Comet

    By Jacques, October 25, 2007
    • 14 replies
    • 7.2k views
    • 
    • iNow
    • August 22, 2008

15. Earth almost distroyed last monday (??!?!?) 1 2 3

    By mooeypoo, July 11, 2006
    • 70 replies
    • 7.2k views
    • 
    • [Tycho?]
    • July 25, 2006

16. News: The International Astronomical Union has no Definition for Big Bang

    By DavidD, February 10, 2011
    • 16 replies
    • 7.1k views
    • 
    • ajb
    • February 20, 2011

17. The Black Hole at The Center of The Universe 1 2

    By astrocat, June 12, 2007
    • 41 replies
    • 7.1k views
    • 
    • igosaur
    • August 22, 2007

18. Finally can we read headline of newspaper from space by telescope ?

    By kos, April 13, 2016
    • 12 replies
    • 7.1k views
    • 
    • Enthalpy
    • April 26, 2016

19. Matter in accretion disks VS higgs-boson at CERN 1 2 3 4

    By David Levy, March 7, 2017
    • 85 replies
    • 7.1k views
    • 
    • Strange
    • April 1, 2017

20. Dark Matter 1 2

    By IM Egdall, March 26, 2012
    • 33 replies
    • 7.1k views
    • 
    • antwis06
    • November 8, 2013

21. Reviving a Planet

    By nrocha20, September 30, 2009
    • 22 replies
    • 7k views
    • 
    • Taffer
    • January 9, 2011

22. Big Bang not an instance of something from nothing? 1 2 3

    By Alfred001, July 26, 2017
    • 64 replies
    • 7k views
    • 
    • Mordred
    • September 30, 2017

23. How Does Stephen Hawking Research?

    By lamp, March 27, 2011
    • 7 replies
    • 7k views
    • 
    • Spyman
    • March 28, 2011

24. Dark Energy 1 2 3

    By ydoaPs, July 6, 2004
    • 51 replies
    • 7k views
    • 
    • aguy2
    • October 7, 2004

25. Dark Matter and Dark Energy 1 2

    By StringJunky, June 23, 2012
    • 45 replies
    • 6.9k views
    • 
    • pantheory
    • September 6, 2012