Astronomy and Cosmology

3686 topics in this forum

1. Gravity

   By Vindhya, July 10, 2008
   • 23 replies
   • 3.4k views
   • 
   • Klaynos
   • August 21, 2008

2. Theory: the big bang

   By Alessar, July 16, 2008
   • 14 replies
   • 2.7k views
   • 
   • Klaynos
   • August 20, 2008

3. A HOLE in the UNIVERSE

   By joshuam168, August 13, 2008
   • 6 replies
   • 1.5k views
   • 
   • Arch2008
   • August 19, 2008

4. Antimatter 1 2

   By skulldude, March 1, 2008
   • 38 replies
   • 4k views
   • 
   • Klaynos
   • August 13, 2008

5. Astronaut Farmers?

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

6. Orbits

   By stevo247, March 8, 2008
   • 23 replies
   • 3.6k views
   • 
   • swansont
   • August 12, 2008

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

   By Yreval, August 11, 2008
   • 8 replies
   • 1.4k views
   • 
   • Arch2008
   • August 12, 2008

8. ionizing radiation in space 1 2

   By Astronautical, August 5, 2008
   • 42 replies
   • 4.4k views
   • 
   • Klaynos
   • August 11, 2008

9. Direct detection of dark energy ?

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

10. Ch-ch-changes

    By EnjoyItClem, August 11, 2008
    • 4 replies
    • 1.1k views
    • 
    • D H
    • August 11, 2008

11. Three-body problem reference frames

    By phate, July 21, 2008
    • 21 replies
    • 5.3k views
    • 
    • phate
    • August 7, 2008

12. Mars water confirmed by chem analysis

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

13. possible intermediate between supernova and hypernova

    By Martin, July 30, 2008
    • 6 replies
    • 1.3k views
    • 
    • Arch2008
    • August 4, 2008

14. Shrinking Sun

    By igosaur, August 2, 2008
    • 6 replies
    • 1.2k views
    • 
    • Martin
    • August 3, 2008

15. Difficult question about photometric redshift...

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

16. computer model of the solar system

    By rufus, July 29, 2008
    • 5 replies
    • 978 views
    • 
    • rufus
    • July 29, 2008

17. coexisting hypotheses

    By Blade, July 27, 2008
    • 19 replies
    • 1.7k views
    • 
    • Arch2008
    • July 29, 2008

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

    By Dak, July 17, 2008
    • 8 replies
    • 1.5k views
    • 
    • swansont
    • July 17, 2008

19. An idea for defining planets.

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

20. Galaxies

    By raf, July 15, 2008
    • 8 replies
    • 1.8k views
    • 
    • Arch2008
    • July 16, 2008

21. Vacuum Question

    By foodchain, July 12, 2008
    • 7 replies
    • 1k views
    • 
    • Arch2008
    • July 14, 2008

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

    By jimmydasaint, July 11, 2008
    • 14 replies
    • 1.7k views
    • 
    • swansont
    • July 13, 2008

23. When the sun goes out....

    By frosch45, July 11, 2008
    • 10 replies
    • 1.4k views
    • 
    • Arch2008
    • July 11, 2008

24. blackholes

    By shadow2121, July 11, 2008
    • 9 replies
    • 1.6k views
    • 
    • Edtharan
    • July 11, 2008

25. Astronomy

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