Astronomy and Cosmology

3713 topics in this forum

1. Is Jupiter ALMOST a dwarf star?

   By dstebbins, February 17, 2010
   • 9 replies
   • 2.9k views
   • 
   • Airbrush
   • February 21, 2010

2. Branes and Dark Energy

   By lawman, February 21, 2010
   • 0 replies
   • 627 views
   • 
   • lawman
   • February 21, 2010

3. Can a Virus survive in space? Random thoughts

   By Law, February 17, 2010
   • 9 replies
   • 11k views
   • 
   • Mr Skeptic
   • February 19, 2010

4. Sun and time

   By midgetwars, February 12, 2010
   • 9 replies
   • 1.7k views
   • 
   • Kyrisch
   • February 18, 2010

5. The fate of the sun In the Holy Quran

   By Marshal86, February 18, 2010
   • 1 reply
   • 950 views
   • 
   • swansont
   • February 18, 2010

6. Massive Entry Heats Up Atmosphere

   By VedekPako, February 10, 2010
   • 15 replies
   • 1.9k views
   • 
   • VedekPako
   • February 16, 2010

7. What would be the size of the event horizon for the whole universe

   By Neil9327, February 14, 2010
   • 2 replies
   • 1.1k views
   • 
   • ajb
   • February 15, 2010

8. how big is the universe? 1 2

   By gib65, December 23, 2009
   • 39 replies
   • 5.5k views
   • 
   • Chriton
   • February 10, 2010

9. Lectures on inflation and cosmological perturbations

   By ajb, February 2, 2010
   • 0 replies
   • 880 views
   • 
   • ajb
   • February 2, 2010

10. Importance of Specific Grav. Binding Energy (??)

    By Widdekind, February 1, 2010
    • 2 replies
    • 1.3k views
    • 
    • Widdekind
    • February 2, 2010

11. Andromeda Galaxy

    By purintjp, January 28, 2010
    • 11 replies
    • 1.9k views
    • 
    • Martin
    • February 2, 2010

12. "Harmonices Mundi"

    By Proteus, January 30, 2010
    • 4 replies
    • 1.5k views
    • 
    • insane_alien
    • January 31, 2010

13. We're getting farther from the Great Attractor (anyone have details on this?)

    By Martin, January 30, 2010
    • 0 replies
    • 1.5k views
    • 
    • Martin
    • January 30, 2010

14. Recommend me a refresher....

    By Salsaman, January 27, 2010
    • 1 reply
    • 790 views
    • 
    • dalemiller
    • January 27, 2010

15. What would happen if the universe stopped expanding?

    By astro geek, January 17, 2010
    • 8 replies
    • 8.7k views
    • 
    • Airbrush
    • January 26, 2010

16. Light vs.Gravity

    By lucky45, January 23, 2010
    • 4 replies
    • 1.1k views
    • 
    • Airbrush
    • January 25, 2010

17. Is gravity wave a mechanical or electromagnet wave?

    By electronicsound, January 22, 2010
    • 3 replies
    • 1.2k views
    • 
    • ajb
    • January 22, 2010

18. The universe is expanding exponentially 1 2

    By gib65, October 11, 2005
    • 43 replies
    • 7.1k views
    • 
    • mooeypoo
    • January 22, 2010

19. Light sails

    By Horza2002, January 21, 2010
    • 8 replies
    • 1.5k views
    • 
    • Mr Skeptic
    • January 22, 2010

20. Nice supercomputer sim of the formation of a small galaxy

    By Martin, January 18, 2010
    • 0 replies
    • 836 views
    • 
    • Martin
    • January 18, 2010

21. Help with a (seeming) discrepancy?

    By Baby Astronaut, December 17, 2009
    • 7 replies
    • 1.8k views
    • 
    • Martin
    • January 17, 2010

22. Magnetic lines in space?

    By Fozzie, January 15, 2010
    • 0 replies
    • 744 views
    • 
    • Fozzie
    • January 15, 2010

23. A Problem in Cold Dark Matter Theory Resolved?

    By toastywombel, January 14, 2010
    • 1 reply
    • 1.3k views
    • 
    • Martin
    • January 14, 2010

24. Martian "forest"

    By Arch2008, January 14, 2010
    • 0 replies
    • 735 views
    • 
    • Arch2008
    • January 14, 2010

25. Overcoming common misconceptions of big bang cosmology

    By Martin, January 25, 2008
    • 15 replies
    • 6.2k views
    • 
    • michel123456
    • January 13, 2010