Astronomy and Cosmology

3712 topics in this forum

1. Possibility of not having a singularity? 1 2

   By Sato, March 9, 2013
   • 25 replies
   • 3.5k views
   • 
   • SplitInfinity
   • March 20, 2013

2. Is the universe collapsing. 1 2

   By derek w, March 14, 2013
   • 25 replies
   • 4k views
   • 
   • SplitInfinity
   • March 20, 2013

3. The Universe sprang out of Nothing

   By Gian, February 28, 2013
   • 7 replies
   • 2.2k views
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   • siderman
   • March 19, 2013

4. What happens when the light from the center of the universe catches up with us?

   By Sean Bodey, March 7, 2013
   • 6 replies
   • 1.7k views
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   • Chrispen Evan
   • March 14, 2013

5. Terra forming Moons in our solar system

   By Kleeklor, March 12, 2013
   • 2 replies
   • 1k views
   • 
   • pwagen
   • March 12, 2013

6. What would a neutron star look like?

   By Fanghur, March 10, 2013
   • 4 replies
   • 1.6k views
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   • StringJunky
   • March 11, 2013

7. The Final Frontier: Achievable in high school?

   By tibieuh, March 6, 2013
   • 8 replies
   • 1.6k views
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   • BearOfNH
   • March 11, 2013

8. How can galaxies exist with the expansion of space? 1 2 3 4

   By Lazarus, February 3, 2013
   • 95 replies
   • 10.3k views
   • 
   • Lazarus
   • March 10, 2013

9. Seeing Black Holes

   By Airbrush, March 1, 2013
   • 4 replies
   • 1.6k views
   • 
   • Chrispen Evan
   • March 9, 2013

10. Hypervelocity Black Holes?

    By Airbrush, March 6, 2013
    • 2 replies
    • 2k views
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    • 36grit
    • March 8, 2013

11. Passing Stars

    By BearOfNH, February 28, 2013
    • 6 replies
    • 2.4k views
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    • Spyman
    • March 6, 2013

12. photogenic coincidence?

    By michel123456, February 25, 2013
    • 3 replies
    • 1.5k views
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    • swansont
    • March 4, 2013

13. How big is the universe? 1 2

    By adam SA, February 5, 2010
    • 25 replies
    • 5.7k views
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    • iNow
    • March 3, 2013

14. define "universe"

    By 36grit, March 2, 2013
    • 3 replies
    • 1.1k views
    • 
    • Klaynos
    • March 2, 2013

15. question about the quantum fluctuation theory of the Big Bang

    By gib65, February 21, 2013
    • 3 replies
    • 1.1k views
    • 
    • timo
    • March 2, 2013

16. Moon Size Increased Question

    By redshift1100, February 24, 2013
    • 2 replies
    • 899 views
    • 
    • redshift1100
    • February 25, 2013

17. There goes the universe.

    By Arch2008, February 19, 2013
    • 9 replies
    • 1.8k views
    • 
    • SamBridge
    • February 23, 2013

18. dark energy (not so) obviously

    By alexro, February 18, 2013
    • 16 replies
    • 2k views
    • 
    • ACG52
    • February 23, 2013

19. Artificial Gravity on Spacestation

    By Airbrush, February 19, 2013
    • 7 replies
    • 1.5k views
    • 
    • ARMF
    • February 21, 2013

20. black suction theory

    By Ankit Gupta, February 21, 2013
    • 0 replies
    • 964 views
    • 
    • Ankit Gupta
    • February 21, 2013

21. CDMS (cryogenic dark matter search)

    By ARMF, February 21, 2013
    • 0 replies
    • 907 views
    • 
    • ARMF
    • February 21, 2013

22. Russian Meteor Impact 2-15-13

    By Airbrush, February 21, 2013
    • 1 reply
    • 874 views
    • 
    • hypervalent_iodine
    • February 21, 2013

23. Dark Matter vs. Alternative Theories

    By suburban, February 20, 2013
    • 3 replies
    • 2.2k views
    • 
    • suburban
    • February 20, 2013

24. Dark energy & Expanding Universe

    By 25Hz, May 28, 2012
    • 4 replies
    • 1.5k views
    • 
    • Spyman
    • February 20, 2013

25. Elusive Dark Matter

    By ronians1, February 19, 2013
    • 5 replies
    • 1.3k views
    • 
    • imatfaal
    • February 20, 2013