Astronomy and Cosmology

3713 topics in this forum

1. "Cold Space"

   By frosch45, December 2, 2009
   • 4 replies
   • 2k views
   • 
   • lakmilis
   • December 5, 2009

2. The universe is Euclidian.

   By gib65, November 28, 2009
   • 10 replies
   • 2.2k views
   • 
   • michel123456
   • December 1, 2009

3. Could this scenario occur!?

   By Drilon, November 7, 2009
   • 7 replies
   • 2k views
   • 
   • insane_alien
   • November 21, 2009

4. inflation

   By devrimci_kürt, November 18, 2009
   • 5 replies
   • 1.8k views
   • 
   • ajb
   • November 18, 2009

5. Solar Storm Will Wipe Out Telecom in 2012?

   By OSHMUNNIES, November 18, 2009
   • 1 reply
   • 948 views
   • 
   • Spyman
   • November 18, 2009

6. The Sun: Difference in the surface and corona temperature

   By CaptainPanic, November 6, 2009
   • 3 replies
   • 1.6k views
   • 
   • swansont
   • November 16, 2009

7. How come it's usually stated earth's axial tilt is 23.5 degrees?

   By mzatanoskas, November 15, 2009
   • 6 replies
   • 3.3k views
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   • Ophiolite
   • November 15, 2009

8. What is the difference between Dark Matter and Dark Energy?

   By mlich, December 4, 2006
   • 5 replies
   • 2.3k views
   • 
   • Airbrush
   • November 13, 2009

9. what is the entropy of a black hole ?

   By devrimci_kürt, November 11, 2009
   • 8 replies
   • 1.5k views
   • 
   • ajb
   • November 13, 2009

10. Questions on Dark Energy...

    By rrw4rusty, September 30, 2009
    • 5 replies
    • 1.8k views
    • 
    • Tugrul
    • November 10, 2009

11. black holes and hawking

    By devrimci_kürt, November 10, 2009
    • 2 replies
    • 943 views
    • 
    • ajb
    • November 10, 2009

12. A Universe From Nothing 1 2 3

    By iNow, October 23, 2009
    • 56 replies
    • 10k views
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    • Sorcerer
    • November 7, 2009

13. Is a telescope's resolving power simply a function of it's light collecting ability?

    By mzatanoskas, November 7, 2009
    • 1 reply
    • 2.1k views
    • 
    • ajb
    • November 7, 2009

14. Can someone explain the position of the Sun in this photograph?

    By mzatanoskas, November 6, 2009
    • 3 replies
    • 1.1k views
    • 
    • mzatanoskas
    • November 6, 2009

15. Simple alternative to Dark Energy

    By john hunter, November 5, 2009
    • 0 replies
    • 748 views
    • 
    • john hunter
    • November 5, 2009

16. What would a perfect solar storm do to modern society?

    By bascule, November 3, 2009
    • 13 replies
    • 1.7k views
    • 
    • Mr Skeptic
    • November 4, 2009

17. How much of the celestial sphere do you see per 24hr as opposed to per year?

    By mzatanoskas, November 3, 2009
    • 4 replies
    • 953 views
    • 
    • Sisyphus
    • November 3, 2009

18. Is nuclear fusion powering the sun technically just a theory?

    By Fanghur, October 31, 2009
    • 15 replies
    • 5.1k views
    • 
    • bascule
    • November 2, 2009

19. Expanding universe: once again I am confused...

    By rrw4rusty, October 14, 2009
    • 9 replies
    • 1.8k views
    • 
    • Sorcerer
    • November 2, 2009

20. Shiva impact crater 500 km diameter--bolide estim. 40 km diam

    By Martin, October 16, 2009
    • 6 replies
    • 2.1k views
    • 
    • Widdekind
    • October 31, 2009

21. The Big Bounce

    By andywood, October 27, 2009
    • 4 replies
    • 1.3k views
    • 
    • andywood
    • October 28, 2009

22. How is light generated/emitted from stars?

    By Starstruck, October 24, 2009
    • 7 replies
    • 1.4k views
    • 
    • Caleb
    • October 27, 2009

23. Any good orrery software out there?

    By mzatanoskas, October 26, 2009
    • 5 replies
    • 2.7k views
    • 
    • mzatanoskas
    • October 27, 2009

24. Jupiter's Cloud Bands

    By Gareth56, October 16, 2009
    • 7 replies
    • 1.2k views
    • 
    • insane_alien
    • October 21, 2009

25. Solution of several astronomical riddles

    By Ivan Gorelik, October 19, 2009
    • 0 replies
    • 989 views
    • 
    • Ivan Gorelik
    • October 19, 2009