Astronomy and Cosmology

3705 topics in this forum

1. Comet Questions

   By riddlemethis, October 21, 2013
   • 2 replies
   • 947 views
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   • Enthalpy
   • October 23, 2013

2. Does the idea of a "big bang" make any sense? 1 2 3

   By Windevoid, August 20, 2013
   • 57 replies
   • 7k views
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   • Airbrush
   • October 22, 2013

3. Arrow of time

   By petrushka.googol, October 21, 2013
   • 4 replies
   • 1k views
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   • swansont
   • October 21, 2013

4. Nebular hypothesis

   By Bilal Hussain, October 17, 2013
   • 10 replies
   • 1.7k views
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   • Strange
   • October 21, 2013

5. Why the massive bodies curves space?

   By Гера�им, October 4, 2013
   • 7 replies
   • 1.7k views
   • 
   • Strange
   • October 21, 2013

6. Bing Bang Singularity?

   By BigBang, October 17, 2013
   • 3 replies
   • 1.8k views
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   • BigBang
   • October 17, 2013

7. The origin of the universe

   By The Believer, October 16, 2013
   • 4 replies
   • 1.4k views
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   • Strange
   • October 16, 2013

8. Accelerated movement of celestial bodies

   By too-open-minded, September 25, 2013
   • 13 replies
   • 2k views
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   • Archimedes
   • October 15, 2013

9. universe

   By jobsbala, October 13, 2013
   • 4 replies
   • 1.1k views
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   • Archimedes
   • October 14, 2013

10. Flat space time

    By petrushka.googol, October 10, 2013
    • 4 replies
    • 1.3k views
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    • Deidre
    • October 13, 2013

11. Maximum size of solar system

    By petrushka.googol, October 11, 2013
    • 5 replies
    • 1.3k views
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    • Archimedes
    • October 13, 2013

12. Do stars warp the energy fields of neighboring objects?

    By petrushka.googol, October 8, 2013
    • 2 replies
    • 897 views
    • 
    • BearOfNH
    • October 8, 2013

13. How to find gravitational waves?

    By Гера�им, October 7, 2013
    • 2 replies
    • 957 views
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    • Airbrush
    • October 8, 2013

14. What is the order of magnitude of the mass of photons?

    By petrushka.googol, October 7, 2013
    • 1 reply
    • 908 views
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    • swansont
    • October 7, 2013

15. Continuity of space

    By petrushka.googol, October 6, 2013
    • 3 replies
    • 1.1k views
    • 
    • mathematic
    • October 7, 2013

16. Did the universe have a beginning?

    By petrushka.googol, October 6, 2013
    • 1 reply
    • 989 views
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    • Airbrush
    • October 6, 2013

17. Gravitational waves in space time continuum

    By petrushka.googol, October 6, 2013
    • 2 replies
    • 1.1k views
    • 
    • BusaDave9
    • October 6, 2013

18. Is the Universe perpetual and does the Universe observe the laws of Thermodynamics

    By petrushka.googol, October 5, 2013
    • 3 replies
    • 937 views
    • 
    • BearOfNH
    • October 6, 2013

19. The expanding universe and the speed of light.

    By Preserve, September 23, 2013
    • 20 replies
    • 2.5k views
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    • Delbert
    • October 5, 2013

20. stars orbiting non-stars 1 2

    By Didymus, August 20, 2013
    • 29 replies
    • 3.9k views
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    • Sensei
    • October 5, 2013

21. "Shocking" video of comet ISON causes "panic"?!? 1 2 3

    By sevenseas, June 8, 2013
    • 53 replies
    • 50.2k views
    • 
    • Mr Monkeybat
    • October 3, 2013

22. Accelerating stars aging process

    By too-open-minded, September 25, 2013
    • 12 replies
    • 1.9k views
    • 
    • John Cuthber
    • September 30, 2013

23. The Faintest Stars

    By GeeKay, September 18, 2013
    • 5 replies
    • 1.1k views
    • 
    • GeeKay
    • September 26, 2013

24. The Event Horizon Questions

    By KryptaRax, September 1, 2013
    • 9 replies
    • 1.3k views
    • 
    • Delbert
    • September 14, 2013

25. Mining Asteroids 1 2

    By jfy1966, June 14, 2013
    • 46 replies
    • 5k views
    • 
    • Moonguy
    • September 12, 2013