Astronomy and Cosmology

3705 topics in this forum

1. The expanding universe; chicken or egg?

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

2. the world is like a goldfish bowl

   By Sanford, September 12, 2010
   • 4 replies
   • 3.5k views
   • 
   • tomgwyther
   • September 16, 2010

3. Eddington - Dirac ratios ?

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

4. Where the atoms came from? 1 2

   By needimprovement, August 16, 2010
   • 49 replies
   • 7k views
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   • Airbrush
   • September 4, 2010

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

   By John Salerno, August 8, 2010
   • 14 replies
   • 11.5k views
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   • needimprovement
   • September 3, 2010

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

   By Realitycheck, April 18, 2007
   • 26 replies
   • 9.7k views
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   • Martin
   • September 3, 2010

7. Fantastic new sunspot photo

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

8. modified field Hawking

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

9. Dark matter-energy interactions

   By Darkpassenger, August 8, 2010
   • 9 replies
   • 2.1k views
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   • Airbrush
   • August 19, 2010

10. Accelerating universe and dark matter

    By Forsmann, May 24, 2010
    • 9 replies
    • 2.3k views
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    • Airbrush
    • August 18, 2010

11. Does the universe have "walls"

    By layman77, August 9, 2010
    • 15 replies
    • 6.9k views
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    • CyclOne
    • August 13, 2010

12. Did time move slower in the younger universe?

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

13. Depth of curved spacetime in blackhole

    By Ashish, August 3, 2010
    • 1 reply
    • 1.7k views
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    • Sunil
    • August 11, 2010

14. Black Hole weapon 1 2

    By antimatter, April 27, 2008
    • 36 replies
    • 5.6k views
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    • dragonstar57
    • August 10, 2010

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

    By DrDNA, March 3, 2009
    • 146 replies
    • 17.6k views
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    • dragonstar57
    • August 10, 2010

16. Earthlike Planet at Alpha Centauri A

    By Butters, July 27, 2010
    • 6 replies
    • 4.5k views
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    • Butters
    • August 5, 2010

17. The elliptical path of the sun

    By ChrisW, July 31, 2010
    • 2 replies
    • 2.2k views
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    • Janus
    • July 31, 2010

18. Couple of questions

    By Bergen, July 6, 2010
    • 5 replies
    • 1.4k views
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    • ewmon
    • July 31, 2010

19. Rotating Galaxy Clusters?

    By Fisica, July 15, 2010
    • 6 replies
    • 1.8k views
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    • Royston
    • July 30, 2010

20. Evidence of Water in Lunar Rocks: Water on Moon May Be Widespread, Similar to Earth's

    By alex sam, July 22, 2010
    • 2 replies
    • 976 views
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    • alex sam
    • July 24, 2010

21. How Bright Are Stars and How Many Different Ways Can Astronomers Determine a Star’s Brightness?

    By alex sam, July 22, 2010
    • 1 reply
    • 2.4k views
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    • Martin
    • July 23, 2010

22. Most massive star (10 million times brightness of sun)

    By Martin, July 21, 2010
    • 9 replies
    • 1.7k views
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    • Ophiolite
    • July 23, 2010

23. a space station

    By Mr. physics, July 18, 2010
    • 13 replies
    • 1.9k views
    • 
    • New Zealand
    • July 22, 2010

24. Jupiter and the Eye of Horus

    By gentleman-farmer, July 17, 2010
    • 1 reply
    • 2.1k views
    • 
    • swansont
    • July 17, 2010

25. Neutron stars 1 2

    By eoinmac, June 21, 2010
    • 33 replies
    • 5k views
    • 
    • Moontanman
    • July 8, 2010