Astronomy and Cosmology

3714 topics in this forum

1. Sunspot Photography

   By YT2095, May 28, 2008
   • 20 replies
   • 6.7k views
   • 
   • YT2095
   • August 22, 2008

2. Strange Comet

   By Jacques, October 25, 2007
   • 14 replies
   • 7.6k views
   • 
   • iNow
   • August 22, 2008

3. Gravity

   By Vindhya, July 10, 2008
   • 23 replies
   • 3.9k views
   • 
   • Klaynos
   • August 21, 2008

4. Theory: the big bang

   By Alessar, July 16, 2008
   • 14 replies
   • 3.1k views
   • 
   • Klaynos
   • August 20, 2008

5. A HOLE in the UNIVERSE

   By joshuam168, August 13, 2008
   • 6 replies
   • 1.7k views
   • 
   • Arch2008
   • August 19, 2008

6. Antimatter 1 2

   By skulldude, March 1, 2008
   • 38 replies
   • 4.8k views
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   • Klaynos
   • August 13, 2008

7. Astronaut Farmers?

   By Arch2008, August 13, 2008
   • 0 replies
   • 841 views
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   • Arch2008
   • August 13, 2008

8. Orbits

   By stevo247, March 8, 2008
   • 23 replies
   • 4.3k views
   • 
   • swansont
   • August 12, 2008

9. A Question Regarding Hawking Radiation and the Evaporation of Black Holes.

   By Yreval, August 11, 2008
   • 8 replies
   • 1.6k views
   • 
   • Arch2008
   • August 12, 2008

10. ionizing radiation in space 1 2

    By Astronautical, August 5, 2008
    • 42 replies
    • 5.1k views
    • 
    • Klaynos
    • August 11, 2008

11. Direct detection of dark energy ?

    By Royston, August 11, 2008
    • 4 replies
    • 966 views
    • 
    • Royston
    • August 11, 2008

12. Ch-ch-changes

    By EnjoyItClem, August 11, 2008
    • 4 replies
    • 1.3k views
    • 
    • D H
    • August 11, 2008

13. Three-body problem reference frames

    By phate, July 21, 2008
    • 21 replies
    • 6.3k views
    • 
    • phate
    • August 7, 2008

14. Mars water confirmed by chem analysis

    By Martin, August 1, 2008
    • 4 replies
    • 1.1k views
    • 
    • Arch2008
    • August 5, 2008

15. possible intermediate between supernova and hypernova

    By Martin, July 30, 2008
    • 6 replies
    • 1.4k views
    • 
    • Arch2008
    • August 4, 2008

16. Shrinking Sun

    By igosaur, August 2, 2008
    • 6 replies
    • 1.4k views
    • 
    • Martin
    • August 3, 2008

17. Difficult question about photometric redshift...

    By steiner, July 31, 2008
    • 1 reply
    • 969 views
    • 
    • Martin
    • July 31, 2008

18. computer model of the solar system

    By rufus, July 29, 2008
    • 5 replies
    • 1.1k views
    • 
    • rufus
    • July 29, 2008

19. coexisting hypotheses

    By Blade, July 27, 2008
    • 19 replies
    • 2k views
    • 
    • Arch2008
    • July 29, 2008

20. why is the sun so big when it rises?

    By Dak, July 17, 2008
    • 8 replies
    • 1.8k views
    • 
    • swansont
    • July 17, 2008

21. An idea for defining planets.

    By Daecon, July 10, 2008
    • 11 replies
    • 1.4k views
    • 
    • Mr Skeptic
    • July 17, 2008

22. Galaxies

    By raf, July 15, 2008
    • 8 replies
    • 2k views
    • 
    • Arch2008
    • July 16, 2008

23. Vacuum Question

    By foodchain, July 12, 2008
    • 7 replies
    • 1.2k views
    • 
    • Arch2008
    • July 14, 2008

24. How Fast Can Dangerous Near Earth Objects Be Detected?

    By jimmydasaint, July 11, 2008
    • 14 replies
    • 2k views
    • 
    • swansont
    • July 13, 2008

25. When the sun goes out....

    By frosch45, July 11, 2008
    • 10 replies
    • 1.7k views
    • 
    • Arch2008
    • July 11, 2008