Astronomy and Cosmology

3713 topics in this forum

1. How can distinguish conves and concave gravitational lensing effect?

   By icarus2, December 13, 2009
   • 3 replies
   • 2.6k views
   • 
   • IM Egdall
   • February 7, 2011

2. Young Sun blasted Methane out of Inner System

   By Widdekind, May 14, 2009
   • 2 replies
   • 1.2k views
   • 
   • alpha2cen
   • February 7, 2011

3. Fractal World?

   By vasosland, February 17, 2010
   • 1 reply
   • 795 views
   • 
   • steevey
   • February 7, 2011

4. giant mysterious objects around a star

   By dream888, December 3, 2010
   • 1 reply
   • 1k views
   • 
   • steevey
   • February 7, 2011

5. Solar radiation and Earth orbit

   By alpha2cen, February 6, 2011
   • 2 replies
   • 1.2k views
   • 
   • D H
   • February 6, 2011

6. Earth gravity effect on the moon surface?

   By alpha2cen, February 6, 2011
   • 2 replies
   • 891 views
   • 
   • insane_alien
   • February 6, 2011

7. New Kepler Discoveries!

   By Airbrush, February 4, 2011
   • 1 reply
   • 788 views
   • 
   • IM Egdall
   • February 5, 2011

8. The Greatest Books in Astronomy?

   By ExploreScience, February 5, 2011
   • 1 reply
   • 762 views
   • 
   • IM Egdall
   • February 5, 2011

9. Neat supernova mechanism for more powerful explosions

   By Martin, September 30, 2010
   • 2 replies
   • 1.3k views
   • 
   • swansont
   • February 5, 2011

10. f(T)

    By researcher1, February 5, 2011
    • 8 replies
    • 1.1k views
    • 
    • researcher1
    • February 5, 2011

11. Can X-rays be reflected?

    By helium, February 3, 2011
    • 4 replies
    • 7.1k views
    • 
    • lemur
    • February 3, 2011

12. red to blue doppler affect

    By 36grit, January 27, 2011
    • 6 replies
    • 1.3k views
    • 
    • alpha2cen
    • January 31, 2011

13. Escape velocity for solar system and galaxy

    By Baby Astronaut, May 6, 2009
    • 13 replies
    • 10.2k views
    • 
    • k nester
    • January 31, 2011

14. cosmic radiation background from BB

    By 36grit, January 19, 2011
    • 12 replies
    • 1.8k views
    • 
    • Mr Skeptic
    • January 28, 2011

15. Questions: Research for Non-Scientific Purpose

    By BuddingAuthor, January 27, 2011
    • 4 replies
    • 1.3k views
    • 
    • Mr Skeptic
    • January 27, 2011

16. Theory of dark matter is based on brightness

    By CaptainPanic, January 24, 2011
    • 14 replies
    • 3k views
    • 
    • Janus
    • January 27, 2011

17. Statistical analysis of cosmic expansion

    By CaptainPanic, January 24, 2011
    • 3 replies
    • 1.1k views
    • 
    • imatfaal
    • January 26, 2011

18. What type of undergrad study would allow me to do Planetary Science

    By Tokage, January 25, 2011
    • 3 replies
    • 953 views
    • 
    • Marat
    • January 25, 2011

19. Earth atmosphere thickness and gravity of the Sun and moon.

    By alpha2cen, January 24, 2011
    • 2 replies
    • 1.8k views
    • 
    • D H
    • January 24, 2011

20. Just because a star is 13b lya doesn't mean it is 13b years old

    By Realitycheck, December 25, 2010
    • 9 replies
    • 2.3k views
    • 
    • Spyman
    • January 24, 2011

21. Stellar system precession?

    By THX-1138, January 24, 2011
    • 2 replies
    • 990 views
    • 
    • Spyman
    • January 24, 2011

22. Light bending, Dark Matter

    By alpha2cen, January 8, 2011
    • 11 replies
    • 2.8k views
    • 
    • amber r shaffer
    • January 22, 2011

23. Dust explosion in the desert?

    By alpha2cen, January 21, 2011
    • 1 reply
    • 788 views
    • 
    • insane_alien
    • January 21, 2011

24. A 2nd Sun?

    By King, North TX, January 21, 2011
    • 13 replies
    • 3.6k views
    • 
    • King, North TX
    • January 21, 2011

25. 1/137 fine structure variable?

    By 36grit, January 19, 2011
    • 4 replies
    • 1.6k views
    • 
    • 36grit
    • January 21, 2011