Astronomy and Cosmology

3713 topics in this forum

1. Observable Universe vs Entire Universe

   By SimonWers, August 11, 2010
   • 17 replies
   • 9.3k views
   • 
   • Spyman
   • December 14, 2010

2. Birth of the Universe from Nothing - Bigbang Simulation!

   By icarus2, December 13, 2010
   • 0 replies
   • 1.1k views
   • 
   • icarus2
   • December 13, 2010

3. expanding and accelerating universe

   By Nimmer, February 9, 2010
   • 5 replies
   • 2.1k views
   • 
   • Pranay Sharma
   • December 12, 2010

4. Flower Constellation

   By hash, December 11, 2010
   • 0 replies
   • 734 views
   • 
   • hash
   • December 11, 2010

5. What makes supernova explode? 1 2

   By alpha2cen, December 2, 2010
   • 39 replies
   • 7k views
   • 
   • swansont
   • December 9, 2010

6. Echos of a bygone Aeon

   By ydoaPs, December 5, 2010
   • 6 replies
   • 2.7k views
   • 
   • Martin
   • December 8, 2010

7. Do Cosmological Neutrinos Redshift, too ?

   By Widdekind, December 6, 2010
   • 3 replies
   • 2.3k views
   • 
   • Martin
   • December 6, 2010

8. Age & Size of Closed Cosmos are related ?

   By Widdekind, December 3, 2010
   • 0 replies
   • 727 views
   • 
   • Widdekind
   • December 3, 2010

9. Does Gravity reduce Entropy ?

   By Widdekind, August 9, 2010
   • 12 replies
   • 5.4k views
   • 
   • Widdekind
   • December 3, 2010

10. Gamma Ray Burst's and Earth's Atmo

    By steevey, November 29, 2010
    • 1 reply
    • 893 views
    • 
    • Arch2008
    • November 29, 2010

11. Questions about space and a suggestion for a space observatory.

    By Incendia, November 19, 2010
    • 12 replies
    • 1.8k views
    • 
    • D H
    • November 29, 2010

12. mater in chidbirth

    By lollo, November 21, 2010
    • 6 replies
    • 1.4k views
    • 
    • mississippichem
    • November 22, 2010

13. first contact 1 2 3 4 6

    By MRlogic, September 22, 2010
    • 132 replies
    • 20.1k views
    • 
    • Airbrush
    • November 21, 2010

14. The Lost Martian moon.

    By Krupin, November 16, 2010
    • 3 replies
    • 1.1k views
    • 
    • lemur
    • November 17, 2010

15. Quick question re: Solar irradiance measurements using radiometers

    By Rhiaden, November 17, 2010
    • 2 replies
    • 1.1k views
    • 
    • Rhiaden
    • November 17, 2010

16. Very old view of the Universe 1 2

    By michel123456, November 9, 2010
    • 34 replies
    • 6.2k views
    • 
    • michel123456
    • November 16, 2010

17. Through the Wormhole - atoms = pixels

    By jkoenig00, November 15, 2010
    • 2 replies
    • 3.8k views
    • 
    • swansont
    • November 15, 2010

18. scale factor

    By michel123456, November 14, 2010
    • 3 replies
    • 4.4k views
    • 
    • michel123456
    • November 15, 2010

19. Dark Energy and Matter

    By Equilibrium, November 10, 2010
    • 12 replies
    • 2.7k views
    • 
    • lemur
    • November 14, 2010

20. Pix of Comet Hartley(2) at 700 km

    By Martin, November 5, 2010
    • 3 replies
    • 1.5k views
    • 
    • michel123456
    • November 10, 2010

21. Galactic Pairs

    By Skaffen, November 9, 2010
    • 8 replies
    • 1.8k views
    • 
    • Skaffen
    • November 9, 2010

22. Why Kuiper belt asteroids are no spherical?

    By alpha2cen, November 8, 2010
    • 4 replies
    • 2.3k views
    • 
    • alpha2cen
    • November 9, 2010

23. what is the next step after rockets?

    By awlaskov, October 27, 2010
    • 12 replies
    • 3k views
    • 
    • Skaffen
    • November 9, 2010

24. Picture of galaxy from when expansion only 600 million years old 1 2 3 4 5

    By Martin, October 22, 2010
    • 106 replies
    • 16.8k views
    • 
    • Martin
    • November 6, 2010

25. Dimension and blackhole

    By Jacques, October 8, 2010
    • 9 replies
    • 2.6k views
    • 
    • Jacques
    • November 3, 2010