Astronomy and Cosmology

3713 topics in this forum

1. Coronal Mass Ejections

   By jamiestem, April 11, 2011
   • 2 replies
   • 1.2k views
   • 
   • jamiestem
   • April 13, 2011

2. Cosmic Microwave Background Anisotropies

   By BJC, April 4, 2011
   • 3 replies
   • 1.5k views
   • 
   • Spyman
   • April 5, 2011

3. Why are planets spherical? Why are molecules spherical? 1 2

   By jamiestem, March 30, 2011
   • 40 replies
   • 6.7k views
   • 
   • lemur
   • April 2, 2011

4. Water on Mercury?

   By sysD, March 30, 2011
   • 18 replies
   • 3.8k views
   • 
   • CaptainPanic
   • March 31, 2011

5. gravity in the asteroid belt

   By lemur, March 28, 2011
   • 2 replies
   • 2.3k views
   • 
   • lemur
   • March 29, 2011

6. Are all atoms spheres?

   By jamiestem, March 28, 2011
   • 1 reply
   • 1.1k views
   • 
   • swansont
   • March 28, 2011

7. How Does Stephen Hawking Research?

   By lamp, March 27, 2011
   • 7 replies
   • 7.2k views
   • 
   • Spyman
   • March 28, 2011

8. same dust cloud at different volumes

   By lemur, March 27, 2011
   • 0 replies
   • 724 views
   • 
   • lemur
   • March 27, 2011

9. If there is no end to the space 1 2 3 4 11

   By HamsterPower, January 14, 2011
   • 263 replies
   • 40.6k views
   • 
   • owl
   • March 24, 2011

10. Inter-galactic Magnetic Fields mass-density-equiv ?

    By Widdekind, February 26, 2011
    • 1 reply
    • 1.2k views
    • 
    • Widdekind
    • March 23, 2011

11. A few thoughts on timeline & entropy 1 2

    By Djordje, March 16, 2011
    • 28 replies
    • 4.6k views
    • 
    • Djordje
    • March 21, 2011

12. Did Hubble get it wrong? 1 2

    By between3and26characterslon, September 7, 2010
    • 26 replies
    • 5.1k views
    • 
    • Simpleton
    • March 21, 2011

13. Everywhere the same red-shift, possible?

    By alpha2cen, March 5, 2011
    • 5 replies
    • 1.9k views
    • 
    • J.C.MacSwell
    • March 19, 2011

14. black hole question

    By sam1111, March 16, 2011
    • 4 replies
    • 1.6k views
    • 
    • Spyman
    • March 16, 2011

15. Exoplanet Safari

    By Arch2008, March 15, 2011
    • 0 replies
    • 1.3k views
    • 
    • Arch2008
    • March 15, 2011

16. what happens to electrons in the sun?

    By lemur, March 14, 2011
    • 6 replies
    • 5.5k views
    • 
    • swansont
    • March 15, 2011

17. Solar fusion

    By alpha2cen, March 14, 2011
    • 1 reply
    • 1.3k views
    • 
    • swansont
    • March 14, 2011

18. Could gravity be proof that the universe is in motion?

    By lv426orbust, March 12, 2011
    • 4 replies
    • 1.9k views
    • 
    • steevey
    • March 13, 2011

19. Gas Rich Galaxies Confirm Prediction of Modified Gravity Theory

    By Jacques, February 25, 2011
    • 10 replies
    • 2.2k views
    • 
    • Widdekind
    • March 12, 2011

20. Shen Kuo, 1031-1095 AD, China's Greatest Astronomer?

    By Anaxagoras, July 3, 2007
    • 3 replies
    • 6.7k views
    • 
    • imatfaal
    • March 10, 2011

21. Before the Bang 1 2

    By owl, February 22, 2011
    • 27 replies
    • 5.1k views
    • 
    • Greatest I am
    • March 9, 2011

22. Some easy questions about space

    By luke, February 25, 2011
    • 3 replies
    • 2.4k views
    • 
    • Airbrush
    • March 9, 2011

23. Alien Bacteria Claimed Found in Meteorite

    By Airbrush, March 7, 2011
    • 3 replies
    • 2.2k views
    • 
    • Airbrush
    • March 8, 2011

24. Does momentum-energy produce gravitation?

    By lemur, February 23, 2011
    • 20 replies
    • 3.6k views
    • 
    • swansont
    • March 4, 2011

25. Gravity interactions via 'virtual gravitons' ??

    By Widdekind, February 26, 2011
    • 13 replies
    • 2.7k views
    • 
    • ajb
    • March 4, 2011