Astronomy and Cosmology

3713 topics in this forum

1. Does black hole has the door of next universe?

   By Sunil, August 12, 2010
   • 2 replies
   • 1k views
   • 
   • Sunil
   • September 29, 2010

2. interstellar travel 1 2

   By MRlogic, September 21, 2010
   • 30 replies
   • 5.6k views
   • 
   • MRlogic
   • September 27, 2010

3. Why do the earth spin araund the sun? 1 2

   By jonsson, September 28, 2009
   • 27 replies
   • 3.9k views
   • 
   • swansont
   • September 24, 2010

4. What is the height of Jupiter's atmsophere?

   By seriously disabled, August 27, 2010
   • 15 replies
   • 3.1k views
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   • Ophiolite
   • September 23, 2010

5. The Moon: Solving Earth's Energy Crisis 1 2

   By VedekPako, February 16, 2010
   • 27 replies
   • 4.3k views
   • 
   • Ophiolite
   • September 22, 2010

6. Planetary system rotation 1 2

   By elas, September 9, 2010
   • 30 replies
   • 4.4k views
   • 
   • elas
   • September 20, 2010

7. Earth revovling around sun?

   By M.Saad, August 14, 2009
   • 15 replies
   • 2.9k views
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   • swansont
   • September 20, 2010

8. Virtual aperture using two telescopes. HOW?

   By netrat, September 18, 2010
   • 0 replies
   • 721 views
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   • netrat
   • September 18, 2010

9. The expanding universe; chicken or egg?

   By pioneer, September 17, 2010
   • 0 replies
   • 1.8k views
   • 
   • pioneer
   • September 17, 2010

10. the world is like a goldfish bowl

    By Sanford, September 12, 2010
    • 4 replies
    • 3.7k views
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    • tomgwyther
    • September 16, 2010

11. Eddington - Dirac ratios ?

    By Widdekind, August 30, 2010
    • 3 replies
    • 1.1k views
    • 
    • Widdekind
    • September 8, 2010

12. Where the atoms came from? 1 2

    By needimprovement, August 16, 2010
    • 49 replies
    • 7.6k views
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    • Airbrush
    • September 4, 2010

13. Why is a full moon best seen at noon?

    By John Salerno, August 8, 2010
    • 14 replies
    • 11.9k views
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    • needimprovement
    • September 3, 2010

14. How can the universe be infinite and finite at the same time? 1 2

    By Realitycheck, April 18, 2007
    • 26 replies
    • 10.1k views
    • 
    • Martin
    • September 3, 2010

15. Fantastic new sunspot photo

    By Dan6541, September 1, 2010
    • 0 replies
    • 817 views
    • 
    • Dan6541
    • September 1, 2010

16. modified field Hawking

    By nalxhal, August 29, 2010
    • 0 replies
    • 783 views
    • 
    • nalxhal
    • August 29, 2010

17. Dark matter-energy interactions

    By Darkpassenger, August 8, 2010
    • 9 replies
    • 2.2k views
    • 
    • Airbrush
    • August 19, 2010

18. Accelerating universe and dark matter

    By Forsmann, May 24, 2010
    • 9 replies
    • 2.4k views
    • 
    • Airbrush
    • August 18, 2010

19. Does the universe have "walls"

    By layman77, August 9, 2010
    • 15 replies
    • 7.2k views
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    • CyclOne
    • August 13, 2010

20. Did time move slower in the younger universe?

    By jryan, August 11, 2010
    • 5 replies
    • 1.4k views
    • 
    • Mr Skeptic
    • August 11, 2010

21. Depth of curved spacetime in blackhole

    By Ashish, August 3, 2010
    • 1 reply
    • 1.8k views
    • 
    • Sunil
    • August 11, 2010

22. Black Hole weapon 1 2

    By antimatter, April 27, 2008
    • 36 replies
    • 6k views
    • 
    • dragonstar57
    • August 10, 2010

23. Asteroid 'gives Earth a close shave' on Monday 1 2 3 4 6

    By DrDNA, March 3, 2009
    • 146 replies
    • 19.3k views
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    • dragonstar57
    • August 10, 2010

24. Earthlike Planet at Alpha Centauri A

    By Butters, July 27, 2010
    • 6 replies
    • 4.6k views
    • 
    • Butters
    • August 5, 2010

25. The elliptical path of the sun

    By ChrisW, July 31, 2010
    • 2 replies
    • 2.3k views
    • 
    • Janus
    • July 31, 2010