Astronomy and Cosmology

3705 topics in this forum

1. Does Gravity reduce Entropy ?

   By Widdekind, August 9, 2010
   • 12 replies
   • 5.2k views
   • 
   • Widdekind
   • December 3, 2010

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

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

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

   By Incendia, November 19, 2010
   • 12 replies
   • 1.6k views
   • 
   • D H
   • November 29, 2010

4. mater in chidbirth

   By lollo, November 21, 2010
   • 6 replies
   • 1.3k views
   • 
   • mississippichem
   • November 22, 2010

5. first contact 1 2 3 4 6

   By MRlogic, September 22, 2010
   • 132 replies
   • 18.7k views
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   • Airbrush
   • November 21, 2010

6. The Lost Martian moon.

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

7. Quick question re: Solar irradiance measurements using radiometers

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

8. Very old view of the Universe 1 2

   By michel123456, November 9, 2010
   • 34 replies
   • 5.9k views
   • 
   • michel123456
   • November 16, 2010

9. Through the Wormhole - atoms = pixels

   By jkoenig00, November 15, 2010
   • 2 replies
   • 3.7k views
   • 
   • swansont
   • November 15, 2010

10. scale factor

    By michel123456, November 14, 2010
    • 3 replies
    • 4.3k views
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    • michel123456
    • November 15, 2010

11. Dark Energy and Matter

    By Equilibrium, November 10, 2010
    • 12 replies
    • 2.5k views
    • 
    • lemur
    • November 14, 2010

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

    By Martin, November 5, 2010
    • 3 replies
    • 1.4k views
    • 
    • michel123456
    • November 10, 2010

13. Galactic Pairs

    By Skaffen, November 9, 2010
    • 8 replies
    • 1.7k views
    • 
    • Skaffen
    • November 9, 2010

14. Why Kuiper belt asteroids are no spherical?

    By alpha2cen, November 8, 2010
    • 4 replies
    • 2.2k views
    • 
    • alpha2cen
    • November 9, 2010

15. what is the next step after rockets?

    By awlaskov, October 27, 2010
    • 12 replies
    • 2.8k views
    • 
    • Skaffen
    • November 9, 2010

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

    By Martin, October 22, 2010
    • 106 replies
    • 15.5k views
    • 
    • Martin
    • November 6, 2010

17. Dimension and blackhole

    By Jacques, October 8, 2010
    • 9 replies
    • 2.5k views
    • 
    • Jacques
    • November 3, 2010

18. Is there such thing as infinite speed? 1 2

    By needimprovement, September 30, 2010
    • 26 replies
    • 5.3k views
    • 
    • newworldphysics
    • November 1, 2010

19. Expanding Universe Illusion Theory 1 2

    By John Phoenix, October 17, 2010
    • 32 replies
    • 6.2k views
    • 
    • Spyman
    • November 1, 2010

20. the fabric of the space-time continuum

    By japan rocks/andromeda, October 4, 2010
    • 7 replies
    • 2.4k views
    • 
    • imatfaal
    • October 31, 2010

21. time and dimensions

    By awlaskov, October 25, 2010
    • 2 replies
    • 1.2k views
    • 
    • lemur
    • October 31, 2010

22. Observable universe thought experiment

    By losfomot, October 25, 2010
    • 11 replies
    • 2.2k views
    • 
    • DanielC
    • October 31, 2010

23. Looking for some good beginner books

    By Danimals, October 28, 2010
    • 0 replies
    • 832 views
    • 
    • Danimals
    • October 28, 2010

24. Dawn's approach to Vesta (orbit planned for August)

    By Martin, October 23, 2010
    • 2 replies
    • 1.7k views
    • 
    • Martin
    • October 28, 2010

25. More about "earth-like" planet Gliese 581g 1 2

    By Martin, September 30, 2010
    • 30 replies
    • 6.2k views
    • 
    • Cap'n Refsmmat
    • October 26, 2010