Astronomy and Cosmology

3705 topics in this forum

1. Earth-like planet only 13 LY away

   By Airbrush, February 8, 2013
   • 0 replies
   • 1k views
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   • Airbrush
   • February 8, 2013

2. "Creation" of the Universe

   By Ivan Tuzikov, February 5, 2013
   • 7 replies
   • 1.7k views
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   • Spyman
   • February 6, 2013

3. Complete information about Black hole

   By NaxAlpha, January 14, 2013
   • 19 replies
   • 2k views
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   • Arch2008
   • February 5, 2013

4. How do we know the universe isn't a loop?

   By SamBridge, January 30, 2013
   • 20 replies
   • 2.2k views
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   • SamBridge
   • February 5, 2013

5. Origin of globular clusters

   By maze, February 4, 2013
   • 0 replies
   • 679 views
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   • maze
   • February 4, 2013

6. What is the rate at which a black hole's gravity weakens as one gets further away?

   By arknd, January 29, 2013
   • 7 replies
   • 1.8k views
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   • Airbrush
   • February 4, 2013

7. Need a scientific adviser for space-strategy game

   By AaronD, February 3, 2013
   • 3 replies
   • 943 views
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   • AaronD
   • February 4, 2013

8. How do we know that stars exist some billion years far?

   By TouK, January 28, 2013
   • 8 replies
   • 1.4k views
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   • alpha2cen
   • January 28, 2013

9. René Descartes's Theory

   By N S, January 20, 2013
   • 5 replies
   • 3.5k views
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   • Civat
   • January 27, 2013

10. Is the same goof being committed in other planets ?

    By Externet, January 21, 2013
    • 8 replies
    • 1.4k views
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    • D H
    • January 24, 2013

11. The luminosity distance and supernovae data

    By cosmos0, January 20, 2013
    • 1 reply
    • 1.3k views
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    • alpha2cen
    • January 20, 2013

12. The Largest Structure In the Universe.

    By DarkStar8, January 11, 2013
    • 6 replies
    • 1.6k views
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    • alpha2cen
    • January 19, 2013

13. The Universe expanding at the speed of light? 1 2

    By Strattos, December 12, 2012
    • 40 replies
    • 4.9k views
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    • Spyman
    • January 18, 2013

14. Expansion of spacetime: Great Break?

    By Coyote, January 17, 2013
    • 3 replies
    • 1.1k views
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    • ACG52
    • January 18, 2013

15. No need for dark energy

    By Jacques, January 11, 2013
    • 13 replies
    • 1.9k views
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    • JohnCli
    • January 16, 2013

16. Interstellar iron cloud deoxygenating the Earth's atmostphere: plausible or nonsense?

    By Fanghur, January 13, 2013
    • 5 replies
    • 1.9k views
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    • John Cuthber
    • January 15, 2013

17. Speed Of Time On Mars Relative To That On Earth

    By grandlear, January 13, 2013
    • 2 replies
    • 2k views
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    • swansont
    • January 14, 2013

18. How can the universe be infinite in size? 1 2 3

    By Airbrush, December 17, 2012
    • 52 replies
    • 7.5k views
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    • Spyman
    • January 14, 2013

19. Curvature of universe

    By NaxAlpha, January 12, 2013
    • 3 replies
    • 1.1k views
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    • elfmotat
    • January 12, 2013

20. Why are early objects so massive?

    By DarkStar8, January 8, 2013
    • 2 replies
    • 819 views
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    • Arch2008
    • January 9, 2013

21. How can the Universe not be infinite in size?

    By Selectrick, January 4, 2013
    • 2 replies
    • 776 views
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    • imatfaal
    • January 7, 2013

22. Do all stars have "Oort Clouds" ??

    By Widdekind, June 2, 2010
    • 16 replies
    • 14.7k views
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    • JohnStu
    • January 6, 2013

23. Universe expansion 1 2 3 4

    By justinater22, December 3, 2012
    • 91 replies
    • 12k views
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    • swansont
    • January 4, 2013

24. Apparent lack of expansion of the universe

    By Jdizz, December 31, 2012
    • 1 reply
    • 1.6k views
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    • swansont
    • December 31, 2012

25. More Kepler Missions?

    By Airbrush, December 29, 2012
    • 0 replies
    • 788 views
    • 
    • Airbrush
    • December 29, 2012