Astronomy and Cosmology

3708 topics in this forum

1. trying to understand Primordial Nucleosynthesis?

   By Widdekind, January 27, 2012
   • 2 replies
   • 2k views
   • 
   • G Anthony
   • January 29, 2012

2. Radius of curvature of Spacetime

   By studiot, April 7, 2018
   • 16 replies
   • 2k views
   • 
   • studiot
   • April 26, 2018

3. Fluid Dynamics equations in Comoving Coords. ??

   By Widdekind, November 23, 2012
   • 2 replies
   • 2k views
   • 
   • juanrga
   • November 28, 2012

4. solar flare blows off a comet's tail (movie)

   By Martin, October 1, 2007
   • 1 reply
   • 2k views
   • 
   • JohnB
   • October 3, 2007

5. question about below absolute zero

   By 36grit, December 20, 2011
   • 18 replies
   • 2k views
   • 
   • imatfaal
   • December 21, 2011

6. Star magnetic field

   By David Levy, October 13, 2012
   • 9 replies
   • 2k views
   • 
   • John Cuthber
   • October 13, 2012

7. solar wind/jovian wind?

   By granpa, January 15, 2009
   • 15 replies
   • 2k views
   • 
   • CaptainPanic
   • January 21, 2009

8. Wind on the moon

   By Guest OBCT, April 3, 2004
   • 9 replies
   • 2k views
   • 
   • Cap'n Refsmmat
   • April 4, 2004

9. is there anything in Universe that is not revolving around something?

   By Lekgolo555, March 14, 2007
   • 15 replies
   • 2k views
   • 
   • [Tycho?]
   • March 15, 2007

10. does all of the laws apply on other planets

    By japan rocks/andromeda, October 4, 2010
    • 7 replies
    • 2k views
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    • ajb
    • October 6, 2010

11. Earth ex -- moon ?

    By JHAQ, July 2, 2009
    • 13 replies
    • 2k views
    • 
    • VedekPako
    • July 21, 2009

12. Our universe exists inside a black hole?

    By Greencanon, February 10, 2016
    • 10 replies
    • 2k views
    • 
    • Mordred
    • February 13, 2016

13. Space approaching a black hole

    By aman, February 22, 2003
    • 10 replies
    • 2k views
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    • Radical Edward
    • May 11, 2003

14. CMBR isotropy, then --> space isotropy, today ?

    By Widdekind, July 23, 2011
    • 4 replies
    • 2k views
    • 
    • Widdekind
    • September 26, 2011

15. How much hydrogen does the sun lose?

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

16. UNFOLDING SPACE.

    By Dr. Funkenstein, April 19, 2015
    • 3 replies
    • 2k views
    • 
    • pavelcherepan
    • April 20, 2015

17. Astronomy as major/career

    By Loki, August 17, 2003
    • 7 replies
    • 2k views
    • 
    • booper54
    • December 13, 2003

18. SuperGiant Branch of HR diagram from MassLoss

    By Widdekind, July 31, 2011
    • 0 replies
    • 2k views
    • 
    • Widdekind
    • July 31, 2011

19. Planet Forms Other Than Sphere

    By Fellow, January 9, 2004
    • 8 replies
    • 2k views
    • 
    • wowbagger
    • January 10, 2004

20. I require a bit of assistance...

    By Mike Kovich, September 27, 2005
    • 14 replies
    • 2k views
    • 
    • LucidDreamer
    • October 14, 2005

21. Arctic Mars pictures you won't believe

    By Martin, November 8, 2009
    • 10 replies
    • 2k views
    • 
    • boymc
    • January 3, 2010

22. Ancient day lengths?

    By Mokele, September 17, 2005
    • 13 replies
    • 2k views
    • 
    • swansont
    • September 23, 2005

23. Flat Universe??

    By mooeypoo, February 16, 2004
    • 11 replies
    • 2k views
    • 
    • JaKiri
    • February 16, 2004

24. with age, stars brighten up & spin down

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

25. Iron and the Death of Stars

    By Preserve, June 21, 2013
    • 3 replies
    • 2k views
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    • Archimedes
    • July 4, 2013