Astronomy and Cosmology

3708 topics in this forum

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

   By Ivan Tuzikov, August 8, 2015
   • 38 replies
   • 3.4k views
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   • Robittybob1
   • October 18, 2015

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

   By Buych778, September 18, 2014
   • 32 replies
   • 4.5k views
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   • Sorcerer
   • October 18, 2015

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

   By jagadeesh, April 3, 2015
   • 25 replies
   • 4.1k views
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   • pavelcherepan
   • October 15, 2015

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

   By spacevudo, September 8, 2014
   • 6 replies
   • 1.7k views
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   • Sensei
   • October 15, 2015

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

   By Cosmobrain, March 4, 2014
   • 43 replies
   • 5.7k views
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   • jeffellis
   • October 15, 2015

6. Planets that live forever

   By MirceaKitsune, May 12, 2014
   • 15 replies
   • 2.6k views
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   • Moontanman
   • October 15, 2015

7. Time travel Possable?

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

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

   By Davwg297, September 5, 2014
   • 8 replies
   • 1.7k views
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   • jeffellis
   • October 14, 2015

9. Universes Not With Different Versions, But Locations

   By jhcrue, December 19, 2014
   • 6 replies
   • 1.4k views
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   • Phi for All
   • October 14, 2015

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

    By Rolando, January 22, 2015
    • 74 replies
    • 7k views
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    • jeffellis
    • October 14, 2015

11. How did the rotation of galaxies?

    By Гера�им, January 15, 2015
    • 6 replies
    • 1.8k views
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    • jeffellis
    • October 14, 2015

12. The science of Parallel universes

    By h_parikhh, April 29, 2015
    • 9 replies
    • 2.2k views
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    • jeffellis
    • October 14, 2015

13. Expanding Or Shrinking?

    By Jack Temmink, May 17, 2015
    • 10 replies
    • 1.8k views
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    • Phi for All
    • October 14, 2015

14. Beginning of life

    By JackG, July 26, 2015
    • 9 replies
    • 1.6k views
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    • Phi for All
    • October 14, 2015

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

    By Sorcerer, August 5, 2015
    • 27 replies
    • 3.3k views
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    • jeffellis
    • October 14, 2015

16. Solar system to scale

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

17. Solar system books

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

18. Astronomy pictures

    By sunshaker, November 12, 2014
    • 11 replies
    • 2.4k views
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    • Acme
    • October 3, 2015

19. Energy into matter

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

20. Density of Micrometeoroids in Space

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

21. Hypervelocity stars, new mechanisms of creation

    By Sensei, August 20, 2015
    • 1 reply
    • 1.1k views
    • 
    • Enthalpy
    • September 29, 2015

22. 'Instability Strip' from fusion PP-to-CNO transition ?

    By Widdekind, August 6, 2011
    • 6 replies
    • 4k views
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    • Enthalpy
    • September 29, 2015

23. 67P as an apple core

    By Enthalpy, February 17, 2015
    • 2 replies
    • 1.5k views
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    • Enthalpy
    • September 29, 2015

24. Solar Neighborhood Enigma 1 2

    By David Levy, September 22, 2015
    • 37 replies
    • 3.3k views
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    • swansont
    • September 25, 2015

25. Aging of neutrinos

    By petrushka.googol, September 20, 2015
    • 8 replies
    • 1.6k views
    • 
    • Mordred
    • September 24, 2015