Astronomy and Cosmology

3705 topics in this forum

1. Final State of the Universe

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

2. Lateral motion

   By michel123456, November 20, 2012
   • 4 replies
   • 1.3k views
   • 
   • michel123456
   • November 22, 2012

3. What "blobs" caused CMB anisotropies ?

   By Widdekind, November 14, 2012
   • 8 replies
   • 1.7k views
   • 
   • Widdekind
   • November 17, 2012

4. galaxy scaling relations

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

5. Higgs Asteroids

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

6. trying to understand Lyman-alpha forest

   By Widdekind, November 14, 2012
   • 1 reply
   • 2.1k views
   • 
   • Widdekind
   • November 15, 2012

7. New optic instrument " interSpeedmeter" - New discover

   By rusek, November 4, 2012
   • 8 replies
   • 1.7k views
   • 
   • John Cuthber
   • November 13, 2012

8. Moon Impacts

   By Moontanman, November 9, 2012
   • 1 reply
   • 1.1k views
   • 
   • swansont
   • November 9, 2012

9. Distance in space

   By stopandthink, November 4, 2012
   • 2 replies
   • 1.6k views
   • 
   • stopandthink
   • November 4, 2012

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

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

11. Photons, what are they really?

    By EWyatt, October 21, 2012
    • 5 replies
    • 1.5k views
    • 
    • pantheory
    • November 1, 2012

12. How can time "begin"? 1 2

    By _heretic, September 29, 2012
    • 47 replies
    • 5k views
    • 
    • Cancer 03
    • October 29, 2012

13. Time Dilation by High Speed

    By Airbrush, October 23, 2012
    • 4 replies
    • 1.3k views
    • 
    • Science_lover
    • October 29, 2012

14. Sun color related to atmospheric pressure?

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

15. Why is the sunrise less red than sunset?

    By Jdizz, October 25, 2012
    • 2 replies
    • 3.1k views
    • 
    • STeve555
    • October 25, 2012

16. Recession velocity

    By StringJunky, October 22, 2012
    • 12 replies
    • 4.6k views
    • 
    • StringJunky
    • October 24, 2012

17. Expansion

    By MrFoos, October 12, 2012
    • 20 replies
    • 3.8k views
    • 
    • imatfaal
    • October 23, 2012

18. Chandra Shows Milky Way is Surrounded by Halo of Hot Gas 1 2

    By CaptainPanic, September 25, 2012
    • 27 replies
    • 3.9k views
    • 
    • Spyman
    • October 22, 2012

19. Liquid water on Mars 1 2 3 4

    By David Levy, October 8, 2012
    • 78 replies
    • 10.4k views
    • 
    • Airbrush
    • October 16, 2012

20. NASA Finds water on the Moon

    By David Levy, October 15, 2012
    • 6 replies
    • 1.5k views
    • 
    • Airbrush
    • October 16, 2012

21. Star magnetic field

    By David Levy, October 13, 2012
    • 9 replies
    • 1.9k views
    • 
    • John Cuthber
    • October 13, 2012

22. Kerr Binary Blackhole systems

    By artbeing B, October 8, 2012
    • 7 replies
    • 3k views
    • 
    • EquisDeXD
    • October 12, 2012

23. bound un-bound gas clouds ??

    By Widdekind, October 12, 2012
    • 0 replies
    • 640 views
    • 
    • Widdekind
    • October 12, 2012

24. Question from an amateur in regards to rotation of sun

    By Notexceling, October 10, 2012
    • 1 reply
    • 951 views
    • 
    • swansont
    • October 10, 2012

25. Big bang or big burp?

    By WHR, August 6, 2012
    • 7 replies
    • 1.8k views
    • 
    • hypervalent_iodine
    • October 10, 2012