Astronomy and Cosmology

3713 topics in this forum

1. could dark matter be nothing; literally?

   By 36grit, November 13, 2012
   • 18 replies
   • 2.6k views
   • 
   • alpha2cen
   • December 3, 2012

2. What is Time? 1 2 3 4

   By Alan McDougall, July 2, 2012
   • 78 replies
   • 10.4k views
   • 
   • anotherfilthyape
   • December 1, 2012

3. Dark Matter - Historical Viewpoints

   By bastion, December 1, 2012
   • 2 replies
   • 801 views
   • 
   • bastion
   • December 1, 2012

4. WMAP polarization data vs. Quasar spectra?

   By Widdekind, December 1, 2012
   • 0 replies
   • 1.1k views
   • 
   • Widdekind
   • December 1, 2012

5. SNII create Deuterium?

   By Widdekind, November 30, 2012
   • 1 reply
   • 930 views
   • 
   • John Cuthber
   • December 1, 2012

6. Fluid Dynamics equations in Comoving Coords. ??

   By Widdekind, November 23, 2012
   • 2 replies
   • 2.1k views
   • 
   • juanrga
   • November 28, 2012

7. 3-body Problem

   By fvicaria, November 28, 2012
   • 0 replies
   • 709 views
   • 
   • fvicaria
   • November 28, 2012

8. Integrating Irregulars into Hubble Sequence ?

   By Widdekind, November 23, 2012
   • 0 replies
   • 898 views
   • 
   • Widdekind
   • November 23, 2012

9. Final State of the Universe

   By Airbrush, November 20, 2012
   • 7 replies
   • 1.5k views
   • 
   • Airbrush
   • November 22, 2012

10. Lateral motion

    By michel123456, November 20, 2012
    • 4 replies
    • 1.4k views
    • 
    • michel123456
    • November 22, 2012

11. What "blobs" caused CMB anisotropies ?

    By Widdekind, November 14, 2012
    • 8 replies
    • 1.9k views
    • 
    • Widdekind
    • November 17, 2012

12. galaxy scaling relations

    By Widdekind, November 16, 2012
    • 1 reply
    • 1.1k views
    • 
    • Arnaud Antoine ANDRIEU
    • November 16, 2012

13. Higgs Asteroids

    By ydoaPs, November 15, 2012
    • 1 reply
    • 1k views
    • 
    • timo
    • November 15, 2012

14. trying to understand Lyman-alpha forest

    By Widdekind, November 14, 2012
    • 1 reply
    • 2.2k views
    • 
    • Widdekind
    • November 15, 2012

15. New optic instrument " interSpeedmeter" - New discover

    By rusek, November 4, 2012
    • 8 replies
    • 1.8k views
    • 
    • John Cuthber
    • November 13, 2012

16. Moon Impacts

    By Moontanman, November 9, 2012
    • 1 reply
    • 1.2k views
    • 
    • swansont
    • November 9, 2012

17. Distance in space

    By stopandthink, November 4, 2012
    • 2 replies
    • 1.7k views
    • 
    • stopandthink
    • November 4, 2012

18. What's happening if the spacetime is torqued?

    By Linker, October 31, 2012
    • 2 replies
    • 1.1k views
    • 
    • juanrga
    • November 1, 2012

19. Photons, what are they really?

    By EWyatt, October 21, 2012
    • 5 replies
    • 1.6k views
    • 
    • pantheory
    • November 1, 2012

20. How can time "begin"? 1 2

    By _heretic, September 29, 2012
    • 47 replies
    • 5.8k views
    • 
    • Cancer 03
    • October 29, 2012

21. Time Dilation by High Speed

    By Airbrush, October 23, 2012
    • 4 replies
    • 1.4k views
    • 
    • Science_lover
    • October 29, 2012

22. Sun color related to atmospheric pressure?

    By Moontanman, October 25, 2012
    • 7 replies
    • 1.9k views
    • 
    • Moontanman
    • October 26, 2012

23. Why is the sunrise less red than sunset?

    By Jdizz, October 25, 2012
    • 2 replies
    • 3.2k views
    • 
    • STeve555
    • October 25, 2012

24. Recession velocity

    By StringJunky, October 22, 2012
    • 12 replies
    • 4.9k views
    • 
    • StringJunky
    • October 24, 2012

25. Expansion

    By MrFoos, October 12, 2012
    • 20 replies
    • 4.1k views
    • 
    • imatfaal
    • October 23, 2012