Astronomy and Cosmology

3705 topics in this forum

1. Time travel? 1 2

   By moonjelly<3, March 8, 2012
   • 40 replies
   • 5.9k views
   • 
   • Astrology
   • October 9, 2012

2. Primordial Nucleosynthesis ?

   By Widdekind, October 6, 2012
   • 4 replies
   • 1.5k views
   • 
   • Widdekind
   • October 8, 2012

3. More than one Big Bang Theory

   By jmbgouveia, October 4, 2012
   • 7 replies
   • 2.4k views
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   • IM Egdall
   • October 7, 2012

4. with age, stars brighten up & spin down

   By Widdekind, November 19, 2011
   • 9 replies
   • 2k views
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   • Enthalpy
   • October 7, 2012

5. Cosmology Basics

   By Barnacles, October 6, 2012
   • 1 reply
   • 900 views
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   • mathematic
   • October 6, 2012

6. Size of the Universe?

   By Chasteen02, September 28, 2012
   • 9 replies
   • 2k views
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   • Airbrush
   • October 2, 2012

7. graviton and the higgs field

   By hewj11, October 1, 2012
   • 4 replies
   • 1.5k views
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   • Ronald Hyde
   • October 1, 2012

8. Is the sun hollow?

   By calprime21, March 23, 2012
   • 11 replies
   • 8.9k views
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   • Ophiolite
   • October 1, 2012

9. Lee Smolin's cosmological natural selection.

   By too-open-minded, September 27, 2012
   • 11 replies
   • 2.1k views
   • 
   • too-open-minded
   • October 1, 2012

10. Hot Jupiters have mis-aligned orbits ?

    By Widdekind, October 1, 2012
    • 0 replies
    • 1k views
    • 
    • Widdekind
    • October 1, 2012

11. Could this disprove dark matter?

    By ElasticCollision, September 30, 2012
    • 2 replies
    • 993 views
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    • ElasticCollision
    • September 30, 2012

12. use earth as Gravity-Wave detector ??

    By Widdekind, September 27, 2012
    • 3 replies
    • 945 views
    • 
    • Widdekind
    • September 28, 2012

13. Dark energy as vacuum fluctuations of photons?

    By IM Egdall, September 27, 2012
    • 0 replies
    • 956 views
    • 
    • IM Egdall
    • September 27, 2012

14. Source of Dark Matter

    By jatmacha, August 25, 2012
    • 11 replies
    • 2.5k views
    • 
    • MigL
    • September 26, 2012

15. Why is there so little dust on the surface of the moon?

    By Fanghur, July 10, 2012
    • 11 replies
    • 6.5k views
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    • ACG52
    • September 25, 2012

16. first trip to the moon

    By akash shrestha, September 22, 2012
    • 4 replies
    • 1.4k views
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    • imatfaal
    • September 24, 2012

17. Formation of Rocky & Metal Meteors

    By Airbrush, September 14, 2012
    • 9 replies
    • 1.4k views
    • 
    • Airbrush
    • September 24, 2012

18. spinny-winny spacey-wacey stuff

    By ydoaPs, September 14, 2012
    • 13 replies
    • 1.9k views
    • 
    • imatfaal
    • September 19, 2012

19. My Pet Peeve About Commonality of Earth-Like Planets

    By Airbrush, September 18, 2012
    • 3 replies
    • 1k views
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    • Moontanman
    • September 18, 2012

20. Redshift. 1 2

    By too-open-minded, August 19, 2012
    • 29 replies
    • 4.8k views
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    • pantheory
    • September 16, 2012

21. Supernova Remnants: the Formation of the Earth?

    By deepnessdawn, September 12, 2012
    • 3 replies
    • 1.3k views
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    • Airbrush
    • September 14, 2012

22. How much hydrogen does the sun lose?

    By Peron, September 9, 2012
    • 5 replies
    • 2k views
    • 
    • Airbrush
    • September 14, 2012

23. quick question on telescopes and stars

    By gebreab, September 10, 2012
    • 9 replies
    • 1.4k views
    • 
    • Airbrush
    • September 14, 2012

24. Diracs Large Number Hypothesis

    By Ronald Hyde, August 21, 2012
    • 5 replies
    • 1.4k views
    • 
    • granpa
    • September 14, 2012

25. Do infinite space models contradict Olber's paradox?

    By Huldrich, August 29, 2012
    • 10 replies
    • 2.6k views
    • 
    • Spyman
    • September 14, 2012