Astronomy and Cosmology

3713 topics in this forum

1. Age of the Universe

   By Jdaniel343, January 17, 2014
   • 10 replies
   • 2k views
   • 
   • Jdaniel343
   • January 18, 2014

2. The big bang still happening? 1 2 3

   By too-open-minded, October 10, 2013
   • 51 replies
   • 8k views
   • 
   • Alan McDougall
   • January 14, 2014

3. Changing a spaceship's direction via ejecting mass 1 2

   By CyborgTriceratops, December 31, 2013
   • 35 replies
   • 3.9k views
   • 
   • Alan McDougall
   • January 9, 2014

4. Size of the Universe

   By Perkinsjc12, November 8, 2013
   • 6 replies
   • 1.8k views
   • 
   • Alan McDougall
   • January 4, 2014

5. Is the universe expanding/stretching or are we hurtling towards something?

   By FunkyAce07, January 1, 2014
   • 2 replies
   • 1.1k views
   • 
   • Alan McDougall
   • January 4, 2014

6. Meteoric Impacts on ice.

   By JohnB, November 23, 2011
   • 22 replies
   • 5.1k views
   • 
   • coden3
   • January 2, 2014

7. curious about the moon

   By 36grit, December 29, 2013
   • 4 replies
   • 1.4k views
   • 
   • Enthalpy
   • January 2, 2014

8. Exact time Earth completing its orbit around the Sun...

   By robotoidhuman, December 30, 2013
   • 5 replies
   • 1.5k views
   • 
   • Janus
   • January 1, 2014

9. Eclipse and the Accelleration of the Earth ?

   By Bjarne, September 26, 2013
   • 13 replies
   • 1.7k views
   • 
   • swansont
   • December 31, 2013

10. multiple universe 1 2

    By simong, November 29, 2013
    • 45 replies
    • 5.5k views
    • 
    • Dekan
    • December 29, 2013

11. The structure of the Universe?

    By Гера�им, December 18, 2013
    • 5 replies
    • 1.4k views
    • 
    • ГераÑ�им
    • December 21, 2013

12. Dark Energy, Dark Matter and Antigravity

    By Done, November 23, 2013
    • 6 replies
    • 7.8k views
    • 
    • hoola
    • December 19, 2013

13. Holographic Universe

    By marevangel, December 14, 2013
    • 5 replies
    • 2k views
    • 
    • hoola
    • December 17, 2013

14. Typhoons and galaxies

    By Bart, November 24, 2013
    • 18 replies
    • 2.8k views
    • 
    • Ophiolite
    • December 16, 2013

15. Space expansion & Virtual Particles

    By Simpleton, December 10, 2013
    • 5 replies
    • 1.6k views
    • 
    • hoola
    • December 15, 2013

16. The Universe shouldn't expand infinitely?

    By Гера�им, November 10, 2013
    • 21 replies
    • 3.9k views
    • 
    • Simpleton
    • December 10, 2013

17. ISON vs Voyager: Speed & Distance

    By skuzme210, December 3, 2013
    • 2 replies
    • 874 views
    • 
    • skuzme210
    • December 3, 2013

18. Please help identify, possibly comet Ison

    By TahoeMagick, November 26, 2013
    • 2 replies
    • 1k views
    • 
    • Delbert
    • December 3, 2013

19. fundamental or not

    By Ankit Gupta, November 22, 2013
    • 14 replies
    • 1.8k views
    • 
    • swansont
    • November 28, 2013

20. Space Travel & Gravity Fields

    By GeeKay, November 21, 2013
    • 2 replies
    • 1.1k views
    • 
    • GeeKay
    • November 24, 2013

21. COMET Ison coming into view - reported Nov 23 Horizon BBC2

    By Mike Smith Cosmos, November 23, 2013
    • 5 replies
    • 1.7k views
    • 
    • Mike Smith Cosmos
    • November 24, 2013

22. Explanation of element line emission spectra.

    By howlingmadpanda, November 23, 2013
    • 0 replies
    • 1.1k views
    • 
    • howlingmadpanda
    • November 23, 2013

23. Titan light

    By Gian, November 20, 2013
    • 3 replies
    • 1.3k views
    • 
    • Janus
    • November 22, 2013

24. Star Magnitude Query

    By GeeKay, November 7, 2013
    • 5 replies
    • 1.5k views
    • 
    • GeeKay
    • November 14, 2013

25. Dark Matter 1 2

    By IM Egdall, March 26, 2012
    • 33 replies
    • 7.9k views
    • 
    • antwis06
    • November 8, 2013