Astronomy and Cosmology

3705 topics in this forum

1. ionizing radiation in space 1 2

   By Astronautical, August 5, 2008
   • 42 replies
   • 4.6k views
   • 
   • Klaynos
   • August 11, 2008

2. Direct detection of dark energy ?

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

3. Ch-ch-changes

   By EnjoyItClem, August 11, 2008
   • 4 replies
   • 1.2k views
   • 
   • D H
   • August 11, 2008

4. Three-body problem reference frames

   By phate, July 21, 2008
   • 21 replies
   • 5.7k views
   • 
   • phate
   • August 7, 2008

5. Mars water confirmed by chem analysis

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

6. possible intermediate between supernova and hypernova

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

7. Shrinking Sun

   By igosaur, August 2, 2008
   • 6 replies
   • 1.3k views
   • 
   • Martin
   • August 3, 2008

8. Difficult question about photometric redshift...

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

9. computer model of the solar system

   By rufus, July 29, 2008
   • 5 replies
   • 1k views
   • 
   • rufus
   • July 29, 2008

10. coexisting hypotheses

    By Blade, July 27, 2008
    • 19 replies
    • 1.8k views
    • 
    • Arch2008
    • July 29, 2008

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

    By Dak, July 17, 2008
    • 8 replies
    • 1.6k views
    • 
    • swansont
    • July 17, 2008

12. An idea for defining planets.

    By Daecon, July 10, 2008
    • 11 replies
    • 1.3k views
    • 
    • Mr Skeptic
    • July 17, 2008

13. Galaxies

    By raf, July 15, 2008
    • 8 replies
    • 1.9k views
    • 
    • Arch2008
    • July 16, 2008

14. Vacuum Question

    By foodchain, July 12, 2008
    • 7 replies
    • 1.1k views
    • 
    • Arch2008
    • July 14, 2008

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

    By jimmydasaint, July 11, 2008
    • 14 replies
    • 1.8k views
    • 
    • swansont
    • July 13, 2008

16. When the sun goes out....

    By frosch45, July 11, 2008
    • 10 replies
    • 1.5k views
    • 
    • Arch2008
    • July 11, 2008

17. blackholes

    By shadow2121, July 11, 2008
    • 9 replies
    • 1.7k views
    • 
    • Edtharan
    • July 11, 2008

18. Astronomy

    By Vindhya, July 6, 2008
    • 3 replies
    • 1k views
    • 
    • ajb
    • July 8, 2008

19. Dimensions?

    By person, July 6, 2008
    • 10 replies
    • 1.7k views
    • 
    • iNow
    • July 8, 2008

20. SETI Net shows a hit at Iota Orionis

    By JamesBrown, July 6, 2008
    • 0 replies
    • 837 views
    • 
    • JamesBrown
    • July 6, 2008

21. Collapse of one region in time-space?

    By Joonasle, July 3, 2008
    • 5 replies
    • 1.3k views
    • 
    • Arch2008
    • July 4, 2008

22. Universes outside the universe

    By barbie.=^.^=, April 13, 2008
    • 19 replies
    • 2.8k views
    • 
    • Arch2008
    • July 3, 2008

23. Sunrise Times In Southern California

    By JyBrd, June 28, 2008
    • 14 replies
    • 2.5k views
    • 
    • D H
    • June 30, 2008

24. Ancient Martian impact

    By Arch2008, June 26, 2008
    • 1 reply
    • 823 views
    • 
    • antimatter
    • June 27, 2008

25. conjunction shudder effects

    By pantheon, June 24, 2008
    • 2 replies
    • 1.1k views
    • 
    • Mr Skeptic
    • June 25, 2008