Astronomy and Cosmology

3705 topics in this forum

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

   By Lazarus, February 3, 2013
   • 95 replies
   • 9.5k views
   • 
   • Lazarus
   • March 10, 2013

2. Seeing Black Holes

   By Airbrush, March 1, 2013
   • 4 replies
   • 1.5k views
   • 
   • Chrispen Evan
   • March 9, 2013

3. Hypervelocity Black Holes?

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

4. Passing Stars

   By BearOfNH, February 28, 2013
   • 6 replies
   • 2.3k views
   • 
   • Spyman
   • March 6, 2013

5. photogenic coincidence?

   By michel123456, February 25, 2013
   • 3 replies
   • 1.4k views
   • 
   • swansont
   • March 4, 2013

6. How big is the universe? 1 2

   By adam SA, February 5, 2010
   • 25 replies
   • 5.4k views
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   • iNow
   • March 3, 2013

7. define "universe"

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

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

   By gib65, February 21, 2013
   • 3 replies
   • 1k views
   • 
   • timo
   • March 2, 2013

9. Moon Size Increased Question

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

10. There goes the universe.

    By Arch2008, February 19, 2013
    • 9 replies
    • 1.7k views
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    • SamBridge
    • February 23, 2013

11. dark energy (not so) obviously

    By alexro, February 18, 2013
    • 16 replies
    • 1.8k views
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    • ACG52
    • February 23, 2013

12. Artificial Gravity on Spacestation

    By Airbrush, February 19, 2013
    • 7 replies
    • 1.4k views
    • 
    • ARMF
    • February 21, 2013

13. black suction theory

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

14. CDMS (cryogenic dark matter search)

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

15. Russian Meteor Impact 2-15-13

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

16. Dark Matter vs. Alternative Theories

    By suburban, February 20, 2013
    • 3 replies
    • 2.1k views
    • 
    • suburban
    • February 20, 2013

17. Dark energy & Expanding Universe

    By 25Hz, May 28, 2012
    • 4 replies
    • 1.4k views
    • 
    • Spyman
    • February 20, 2013

18. Elusive Dark Matter

    By ronians1, February 19, 2013
    • 5 replies
    • 1.2k views
    • 
    • imatfaal
    • February 20, 2013

19. 2012 DA14

    By imatfaal, February 15, 2013
    • 5 replies
    • 1.8k views
    • 
    • imatfaal
    • February 19, 2013

20. Under surveillance 1 2

    By Ivan Tuzikov, February 9, 2012
    • 37 replies
    • 4.8k views
    • 
    • Ophiolite
    • February 18, 2013

21. 2012 DA14 Flyby path

    By LaurieAG, February 13, 2013
    • 13 replies
    • 3.3k views
    • 
    • Ophiolite
    • February 18, 2013

22. Different Compositions of Colored Atmosphere?

    By kairunotabi, February 15, 2013
    • 4 replies
    • 1.1k views
    • 
    • Enthalpy
    • February 17, 2013

23. whats gonna happen?

    By dripto biswas, February 14, 2013
    • 1 reply
    • 773 views
    • 
    • pwagen
    • February 14, 2013

24. Interesting way to look at mother earth using a balloon and some good music !

    By dbFrame, February 13, 2013
    • 0 replies
    • 518 views
    • 
    • dbFrame
    • February 13, 2013

25. do orbiting stars distort black holes?

    By 36grit, February 8, 2013
    • 7 replies
    • 1.4k views
    • 
    • ajb
    • February 10, 2013