Astronomy and Cosmology

3713 topics in this forum

1. Universe expansion

   By secondtrooper, October 22, 2015
   • 5 replies
   • 1.5k views
   • 
   • Endy0816
   • October 22, 2015

2. is comoving radial distance of universe = cmb radius ?

   By stephaneww, October 20, 2015
   • 0 replies
   • 933 views
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   • stephaneww
   • October 20, 2015

3. Dark matter in higher dimensional space.

   By Sorcerer, October 17, 2015
   • 11 replies
   • 2k views
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   • Bill Angel
   • October 19, 2015

4. Any Intelligent Life on Earth? 1 2

   By Airbrush, August 21, 2014
   • 33 replies
   • 4.5k views
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   • Sorcerer
   • October 18, 2015

5. Universe from nothing vs Mirror Universe

   By Sorcerer, October 18, 2015
   • 2 replies
   • 1.1k views
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   • Sorcerer
   • October 18, 2015

6. Some thoughts concerning search for extra-terrestrials 1 2

   By Ivan Tuzikov, August 8, 2015
   • 38 replies
   • 3.7k views
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   • Robittybob1
   • October 18, 2015

7. So if dark matter exists, what would it be made out of? 1 2

   By Buych778, September 18, 2014
   • 32 replies
   • 4.8k views
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   • Sorcerer
   • October 18, 2015

8. Did wars helped us advance in technology? 1 2

   By jagadeesh, April 3, 2015
   • 25 replies
   • 4.4k views
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   • pavelcherepan
   • October 15, 2015

9. Stop Worrying About the Future? Scientists Claims We Can See It

   By spacevudo, September 8, 2014
   • 6 replies
   • 1.8k views
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   • Sensei
   • October 15, 2015

10. Why are people not so interested in Astronomy? 1 2

    By Cosmobrain, March 4, 2014
    • 43 replies
    • 6.2k views
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    • jeffellis
    • October 15, 2015

11. Planets that live forever

    By MirceaKitsune, May 12, 2014
    • 15 replies
    • 2.9k views
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    • Moontanman
    • October 15, 2015

12. Time travel Possable?

    By Malice13111, February 5, 2014
    • 5 replies
    • 1.8k views
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    • jeffellis
    • October 15, 2015

13. The Universe-How/Why????

    By Davwg297, September 5, 2014
    • 8 replies
    • 1.8k views
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    • jeffellis
    • October 14, 2015

14. Universes Not With Different Versions, But Locations

    By jhcrue, December 19, 2014
    • 6 replies
    • 1.5k views
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    • Phi for All
    • October 14, 2015

15. Can there be black holes in a universe of finite age? 1 2 3

    By Rolando, January 22, 2015
    • 74 replies
    • 7.5k views
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    • jeffellis
    • October 14, 2015

16. How did the rotation of galaxies?

    By Гера�им, January 15, 2015
    • 6 replies
    • 1.9k views
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    • jeffellis
    • October 14, 2015

17. The science of Parallel universes

    By h_parikhh, April 29, 2015
    • 9 replies
    • 2.4k views
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    • jeffellis
    • October 14, 2015

18. Expanding Or Shrinking?

    By Jack Temmink, May 17, 2015
    • 10 replies
    • 1.9k views
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    • Phi for All
    • October 14, 2015

19. Beginning of life

    By JackG, July 26, 2015
    • 9 replies
    • 1.7k views
    • 
    • Phi for All
    • October 14, 2015

20. Is it misleading to say "IN the universe" 1 2

    By Sorcerer, August 5, 2015
    • 27 replies
    • 3.5k views
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    • jeffellis
    • October 14, 2015

21. Solar system to scale

    By michel123456, October 2, 2015
    • 1 reply
    • 926 views
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    • michel123456
    • October 4, 2015

22. Solar system books

    By Chriss, October 3, 2015
    • 0 replies
    • 659 views
    • 
    • Chriss
    • October 3, 2015

23. Astronomy pictures

    By sunshaker, November 12, 2014
    • 11 replies
    • 2.5k views
    • 
    • Acme
    • October 3, 2015

24. Energy into matter

    By caledonia, October 1, 2015
    • 1 reply
    • 966 views
    • 
    • swansont
    • October 1, 2015

25. Density of Micrometeoroids in Space

    By GeeKay, October 1, 2015
    • 0 replies
    • 1.2k views
    • 
    • GeeKay
    • October 1, 2015