Astronomy and Cosmology

3705 topics in this forum

1. Momentum of a single photon

   By PaulS1950, April 20, 2010
   • 8 replies
   • 1.5k views
   • 
   • swansont
   • April 21, 2010

2. Can Light Actually Slow Down?

   By CameronFriday, April 17, 2010
   • 13 replies
   • 2.4k views
   • 
   • D H
   • April 21, 2010

3. The expansion of space and redshift of light

   By Chromed1, April 20, 2010
   • 1 reply
   • 2.2k views
   • 
   • Spyman
   • April 21, 2010

4. triple point of light

   By stevebtaylor, March 24, 2010
   • 12 replies
   • 1.6k views
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   • stevebtaylor
   • April 19, 2010

5. saturation point of light 1 2

   By stevebtaylor, March 30, 2010
   • 25 replies
   • 3.5k views
   • 
   • stevebtaylor
   • April 19, 2010

6. Gravitational-wave Singularity 1 2

   By stevebtaylor, March 26, 2010
   • 26 replies
   • 3.3k views
   • 
   • stevebtaylor
   • April 19, 2010

7. 3-step blackhole

   By stevebtaylor, April 16, 2010
   • 2 replies
   • 861 views
   • 
   • stevebtaylor
   • April 19, 2010

8. Solar Wind as an energy source?

   By Joshua Buffone, April 11, 2010
   • 3 replies
   • 1.2k views
   • 
   • Mr Skeptic
   • April 19, 2010

9. The wmap image, how can it be accurate?

   By epsilonbeta, April 17, 2010
   • 0 replies
   • 647 views
   • 
   • epsilonbeta
   • April 17, 2010

10. How do comp. sims. handle space Expansion?

    By Widdekind, April 10, 2010
    • 4 replies
    • 914 views
    • 
    • Widdekind
    • April 17, 2010

11. 30% of Nuclear Arsenals, for what?

    By Airbrush, April 14, 2010
    • 21 replies
    • 2.9k views
    • 
    • Airbrush
    • April 16, 2010

12. Composite "All Spectrum" Telescopes ??

    By Widdekind, April 16, 2010
    • 1 reply
    • 705 views
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    • swansont
    • April 16, 2010

13. new supernovae

    By harls, April 15, 2010
    • 1 reply
    • 783 views
    • 
    • Arch2008
    • April 15, 2010

14. Could this explain the dark energy phenomenon? 1 2

    By john hunter, March 23, 2010
    • 31 replies
    • 3.7k views
    • 
    • michel123456
    • April 15, 2010

15. Fact or fiction?

    By pink_trike, April 12, 2010
    • 9 replies
    • 1.9k views
    • 
    • tomgwyther
    • April 14, 2010

16. wondering what is up with our sun

    By japan rocks/andromeda, March 27, 2010
    • 5 replies
    • 1.1k views
    • 
    • the tree
    • April 14, 2010

17. have you ever thought...

    By japan rocks/andromeda, March 27, 2010
    • 4 replies
    • 1.1k views
    • 
    • japan rocks/andromeda
    • April 13, 2010

18. Super-massive Black holes: What's the mystery?

    By jryan, April 8, 2010
    • 6 replies
    • 1.4k views
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    • Airbrush
    • April 10, 2010

19. Curvature and spatial closure of the universe.

    By Dr. Jekyll, August 13, 2009
    • 6 replies
    • 2.8k views
    • 
    • Widdekind
    • April 10, 2010

20. Venus' ancient oceans

    By VedekPako, April 6, 2010
    • 3 replies
    • 1.3k views
    • 
    • Airbrush
    • April 7, 2010

21. Simulating various spacetime topologies ?

    By Widdekind, April 7, 2010
    • 0 replies
    • 602 views
    • 
    • Widdekind
    • April 7, 2010

22. Asteroid?

    By Gareth56, April 1, 2010
    • 6 replies
    • 1.4k views
    • 
    • Gareth56
    • April 6, 2010

23. Observing from Mauna Kea

    By Robin Hood, April 3, 2010
    • 0 replies
    • 783 views
    • 
    • Robin Hood
    • April 3, 2010

24. What news from the LHC?

    By Airbrush, April 2, 2010
    • 8 replies
    • 1.3k views
    • 
    • insane_alien
    • April 3, 2010

25. galileo's moon

    By ishmael, April 3, 2010
    • 2 replies
    • 1.3k views
    • 
    • Moontanman
    • April 3, 2010