Astronomy and Cosmology

3714 topics in this forum

1. Expansion

   By MrFoos, October 12, 2012
   • 20 replies
   • 4.2k views
   • 
   • imatfaal
   • October 23, 2012

2. Chandra Shows Milky Way is Surrounded by Halo of Hot Gas 1 2

   By CaptainPanic, September 25, 2012
   • 27 replies
   • 4.3k views
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   • Spyman
   • October 22, 2012

3. Liquid water on Mars 1 2 3 4

   By David Levy, October 8, 2012
   • 78 replies
   • 11.8k views
   • 
   • Airbrush
   • October 16, 2012

4. NASA Finds water on the Moon

   By David Levy, October 15, 2012
   • 6 replies
   • 1.6k views
   • 
   • Airbrush
   • October 16, 2012

5. Star magnetic field

   By David Levy, October 13, 2012
   • 9 replies
   • 2.1k views
   • 
   • John Cuthber
   • October 13, 2012

6. Kerr Binary Blackhole systems

   By artbeing B, October 8, 2012
   • 7 replies
   • 3.2k views
   • 
   • EquisDeXD
   • October 12, 2012

7. bound un-bound gas clouds ??

   By Widdekind, October 12, 2012
   • 0 replies
   • 678 views
   • 
   • Widdekind
   • October 12, 2012

8. Question from an amateur in regards to rotation of sun

   By Notexceling, October 10, 2012
   • 1 reply
   • 1k views
   • 
   • swansont
   • October 10, 2012

9. Big bang or big burp?

   By WHR, August 6, 2012
   • 7 replies
   • 1.9k views
   • 
   • hypervalent_iodine
   • October 10, 2012

10. Time travel? 1 2

    By moonjelly<3, March 8, 2012
    • 40 replies
    • 6.7k views
    • 
    • Astrology
    • October 9, 2012

11. Primordial Nucleosynthesis ?

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

12. More than one Big Bang Theory

    By jmbgouveia, October 4, 2012
    • 7 replies
    • 2.5k views
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    • IM Egdall
    • October 7, 2012

13. with age, stars brighten up & spin down

    By Widdekind, November 19, 2011
    • 9 replies
    • 2.1k views
    • 
    • Enthalpy
    • October 7, 2012

14. Cosmology Basics

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

15. Size of the Universe?

    By Chasteen02, September 28, 2012
    • 9 replies
    • 2.1k views
    • 
    • Airbrush
    • October 2, 2012

16. graviton and the higgs field

    By hewj11, October 1, 2012
    • 4 replies
    • 1.6k views
    • 
    • Ronald Hyde
    • October 1, 2012

17. Is the sun hollow?

    By calprime21, March 23, 2012
    • 11 replies
    • 9.3k views
    • 
    • Ophiolite
    • October 1, 2012

18. Lee Smolin's cosmological natural selection.

    By too-open-minded, September 27, 2012
    • 11 replies
    • 2.3k views
    • 
    • too-open-minded
    • October 1, 2012

19. Hot Jupiters have mis-aligned orbits ?

    By Widdekind, October 1, 2012
    • 0 replies
    • 1.1k views
    • 
    • Widdekind
    • October 1, 2012

20. Could this disprove dark matter?

    By ElasticCollision, September 30, 2012
    • 2 replies
    • 1k views
    • 
    • ElasticCollision
    • September 30, 2012

21. use earth as Gravity-Wave detector ??

    By Widdekind, September 27, 2012
    • 3 replies
    • 1k views
    • 
    • Widdekind
    • September 28, 2012

22. Dark energy as vacuum fluctuations of photons?

    By IM Egdall, September 27, 2012
    • 0 replies
    • 1k views
    • 
    • IM Egdall
    • September 27, 2012

23. Source of Dark Matter

    By jatmacha, August 25, 2012
    • 11 replies
    • 2.7k views
    • 
    • MigL
    • September 26, 2012

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

    By Fanghur, July 10, 2012
    • 11 replies
    • 6.6k views
    • 
    • ACG52
    • September 25, 2012

25. first trip to the moon

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