Astronomy and Cosmology

3705 topics in this forum

1. Hot Jupiters formed cold ?

   By Widdekind, September 22, 2011
   • 13 replies
   • 4.1k views
   • 
   • Widdekind
   • March 4, 2012

2. The moon

   By morgsboi, February 25, 2012
   • 21 replies
   • 2.7k views
   • 
   • ajb
   • March 2, 2012

3. What do you think about sending radioactive waste to sun...?

   By Ikabot, February 20, 2012
   • 21 replies
   • 2.5k views
   • 
   • John Cuthber
   • March 2, 2012

4. Faster than light?

   By *puffy* japanisthebest, February 6, 2012
   • 4 replies
   • 1.6k views
   • 
   • Airbrush
   • March 1, 2012

5. Is a time machine possible? 1 2 3

   By Chap, January 22, 2012
   • 52 replies
   • 8.7k views
   • 
   • zapatos
   • March 1, 2012

6. Speed of a rocket

   By Gozzer101, January 2, 2012
   • 5 replies
   • 1.8k views
   • 
   • JohnStu
   • March 1, 2012

7. Multiple images of same galaxies?

   By Jiggerj, February 5, 2012
   • 20 replies
   • 3.1k views
   • 
   • zapatos
   • February 29, 2012

8. Gravity, Space Time, Black Holes, 5th Dimension and Big Bang

   By arobertson1, February 17, 2012
   • 4 replies
   • 1.4k views
   • 
   • JohnStu
   • February 29, 2012

9. Matter Deficit in Universe?

   By Jiggerj, February 5, 2012
   • 9 replies
   • 2k views
   • 
   • Moontanman
   • February 29, 2012

10. Stephen Hawking retracted his paradoxical view 1 2

    By G Anthony, September 8, 2011
    • 38 replies
    • 8.5k views
    • 
    • JohnStu
    • February 29, 2012

11. The Sun

    By homie12, February 5, 2012
    • 16 replies
    • 2.6k views
    • 
    • JohnStu
    • February 29, 2012

12. Black Hole Thermodynamics

    By shepherd, February 20, 2012
    • 9 replies
    • 1.4k views
    • 
    • DrRocket
    • February 29, 2012

13. Muitiple Universes In The Same Space?

    By Some "Genius", December 5, 2011
    • 20 replies
    • 3.1k views
    • 
    • JohnStu
    • February 28, 2012

14. Rhawn Joseph

    By panstein, February 27, 2012
    • 1 reply
    • 1.5k views
    • 
    • Phi for All
    • February 27, 2012

15. Big Bang and only 14 billion years? 1 2

    By Jiggerj, February 15, 2012
    • 40 replies
    • 5.3k views
    • 
    • Phi for All
    • February 19, 2012

16. Keplers Laws.

    By SweetScientist, February 15, 2012
    • 12 replies
    • 1.5k views
    • 
    • PaulS1950
    • February 19, 2012

17. Why does gravity create discs?

    By dimreepr, February 9, 2012
    • 2 replies
    • 1.1k views
    • 
    • Keenidiot
    • February 9, 2012

18. Judging Jupiter's distance in the 1600's

    By Jiggerj, January 31, 2012
    • 12 replies
    • 2.2k views
    • 
    • Jiggerj
    • February 8, 2012

19. How do they know it?

    By Airbrush, February 2, 2012
    • 14 replies
    • 2.2k views
    • 
    • imatfaal
    • February 7, 2012

20. My theory to the Universe

    By ncook90, January 25, 2012
    • 5 replies
    • 1.5k views
    • 
    • Jiggerj
    • February 5, 2012

21. Only steps away from the Void

    By PhysicsBurger, February 4, 2012
    • 2 replies
    • 973 views
    • 
    • PhysicsBurger
    • February 5, 2012

22. Simple question

    By akash shrestha, January 12, 2012
    • 10 replies
    • 1.9k views
    • 
    • mathematic
    • February 5, 2012

23. trying to understand gas cloud collapse ?

    By Widdekind, January 25, 2012
    • 3 replies
    • 1.6k views
    • 
    • ajb
    • February 4, 2012

24. matter antimatter asymmetry ??

    By Widdekind, January 14, 2012
    • 5 replies
    • 1.6k views
    • 
    • Widdekind
    • February 2, 2012

25. Where does the moon rise?

    By Primarygun, July 25, 2007
    • 17 replies
    • 94k views
    • 
    • D H
    • January 30, 2012