Astronomy and Cosmology

3705 topics in this forum

1. Black holes emitting radiation

   By Mr. Healy, February 6, 2014
   • 13 replies
   • 1.9k views
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   • Implicate Order
   • February 9, 2014

2. Zones of backward time

   By petrushka.googol, January 22, 2014
   • 16 replies
   • 2.2k views
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   • swansont
   • February 5, 2014

3. The Light Paradox

   By M_Broz, February 5, 2014
   • 2 replies
   • 1.1k views
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   • ajb
   • February 5, 2014

4. photographing stars

   By qaopm, August 16, 2013
   • 9 replies
   • 1.9k views
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   • BearOfNH
   • February 2, 2014

5. Why does the temperature of the core and sufrace of the sun differ so much?

   By yyh020635, January 26, 2014
   • 4 replies
   • 1.1k views
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   • Enthalpy
   • January 29, 2014

6. Where would we be without our moon?

   By ScienceLord, January 15, 2014
   • 14 replies
   • 2.5k views
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   • doccortex
   • January 29, 2014

7. Drunk on Black Holes 1 2 3 4 5

   By decraig, November 20, 2013
   • 113 replies
   • 13.1k views
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   • hypervalent_iodine
   • January 28, 2014

8. Free Astronomy/Science Info sources

   By Astronomy, January 26, 2014
   • 5 replies
   • 1.6k views
   • 
   • hypervalent_iodine
   • January 27, 2014

9. What is Trajectory Deflection Angle

   By Bjarne, January 26, 2014
   • 6 replies
   • 1.7k views
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   • Bjarne
   • January 26, 2014

10. position & time from a picture of the sky. 1 2

    By michel123456, November 10, 2013
    • 28 replies
    • 5.8k views
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    • michel123456
    • January 26, 2014

11. Black hole like simulation in a particle accelerator?

    By petrushka.googol, January 24, 2014
    • 3 replies
    • 1.1k views
    • 
    • Strange
    • January 26, 2014

12. Black holes gaining mass

    By Endercreeper01, January 4, 2014
    • 8 replies
    • 1.9k views
    • 
    • Strange
    • January 24, 2014

13. Your take on Antimatter and Our Universe?

    By Abhi_KS, December 26, 2013
    • 15 replies
    • 2.2k views
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    • Jdaniel343
    • January 24, 2014

14. How realistically can we describe the early history of our universe?

    By petrushka.googol, January 23, 2014
    • 1 reply
    • 772 views
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    • Strange
    • January 23, 2014

15. Rosetta probe...

    By Externet, January 21, 2014
    • 3 replies
    • 1.3k views
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    • Enthalpy
    • January 22, 2014

16. Hubble looking at old galaxies

    By Jdaniel343, January 22, 2014
    • 2 replies
    • 936 views
    • 
    • Enthalpy
    • January 22, 2014

17. Expansion of the universe

    By azafran, January 21, 2014
    • 4 replies
    • 1.4k views
    • 
    • Spyman
    • January 21, 2014

18. Age of the Universe

    By Jdaniel343, January 17, 2014
    • 10 replies
    • 1.8k views
    • 
    • Jdaniel343
    • January 18, 2014

19. The big bang still happening? 1 2 3

    By too-open-minded, October 10, 2013
    • 51 replies
    • 7.3k views
    • 
    • Alan McDougall
    • January 14, 2014

20. Changing a spaceship's direction via ejecting mass 1 2

    By CyborgTriceratops, December 31, 2013
    • 35 replies
    • 3.5k views
    • 
    • Alan McDougall
    • January 9, 2014

21. Size of the Universe

    By Perkinsjc12, November 8, 2013
    • 6 replies
    • 1.7k views
    • 
    • Alan McDougall
    • January 4, 2014

22. Is the universe expanding/stretching or are we hurtling towards something?

    By FunkyAce07, January 1, 2014
    • 2 replies
    • 968 views
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    • Alan McDougall
    • January 4, 2014

23. Meteoric Impacts on ice.

    By JohnB, November 23, 2011
    • 22 replies
    • 4.8k views
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    • coden3
    • January 2, 2014

24. curious about the moon

    By 36grit, December 29, 2013
    • 4 replies
    • 1.3k views
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    • Enthalpy
    • January 2, 2014

25. Exact time Earth completing its orbit around the Sun...

    By robotoidhuman, December 30, 2013
    • 5 replies
    • 1.4k views
    • 
    • Janus
    • January 1, 2014