Astronomy and Cosmology

3708 topics in this forum

1. our galaxy

   By lukemcleod, June 14, 2013
   • 8 replies
   • 1.6k views
   • 
   • Airbrush
   • June 18, 2013

2. I really need your help with some calculations 1 2

   By tmdarkmatter, March 17
   • 28 replies
   • 1.6k views
   • 
   • tmdarkmatter
   • March 23

3. The Largest Structure In the Universe.

   By DarkStar8, January 11, 2013
   • 6 replies
   • 1.6k views
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   • alpha2cen
   • January 19, 2013

4. fundamental or not

   By Ankit Gupta, November 22, 2013
   • 14 replies
   • 1.6k views
   • 
   • swansont
   • November 28, 2013

5. The Issue of the Beginning in Quantum Gravity

   By Martin, May 10, 2006
   • 11 replies
   • 1.6k views
   • 
   • bascule
   • May 13, 2006

6. Questions about solar system dynamics etc.

   By SriDharma, July 20, 2007
   • 7 replies
   • 1.6k views
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   • grifter
   • July 20, 2007

7. The Norfolk Island effect or a magnetic link 24/7?

   By acsinuk, May 21, 2015
   • 4 replies
   • 1.6k views
   • 
   • imatfaal
   • May 22, 2015

8. The Copernican principle

   By __Ben__, January 28, 2022
   • 13 replies
   • 1.6k views
   • 
   • Johnmo89
   • February 4, 2022

9. A round trip around the universe.

   By geordief, November 3, 2016
   • 11 replies
   • 1.6k views
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   • AbstractDreamer
   • December 2, 2016

10. Does The Universe Hve A Heart?

    By Guest HYavel, May 5, 2003
    • 3 replies
    • 1.6k views
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    • NavajoEverclear
    • June 2, 2003

11. The stars....

    By Improvision, April 29, 2009
    • 8 replies
    • 1.6k views
    • 
    • Martin
    • May 7, 2009

12. Ultimate Ensemble

    By bascule, September 9, 2007
    • 6 replies
    • 1.6k views
    • 
    • bascule
    • September 14, 2007

13. Dark Matter and Gravity

    By foodchain, February 19, 2010
    • 5 replies
    • 1.6k views
    • 
    • alpha2cen
    • February 8, 2011

14. How do we know the age of our universe ?

    By Verusamore, December 5, 2004
    • 7 replies
    • 1.6k views
    • 
    • MOTP
    • December 12, 2004

15. Apparent lack of expansion of the universe

    By Jdizz, December 31, 2012
    • 1 reply
    • 1.6k views
    • 
    • swansont
    • December 31, 2012

16. Aging of neutrinos

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

17. Faster than light?

    By *puffy* japanisthebest, February 6, 2012
    • 4 replies
    • 1.6k views
    • 
    • Airbrush
    • March 1, 2012

18. "Deep Impact" July 4th reminder

    By Martin, June 29, 2005
    • 7 replies
    • 1.6k views
    • 
    • Martin
    • July 4, 2005

19. Magnetic field strength of the earth in center

    By gre, December 22, 2008
    • 11 replies
    • 1.6k views
    • 
    • gre
    • December 23, 2008

20. Sun and time

    By midgetwars, February 12, 2010
    • 9 replies
    • 1.6k views
    • 
    • Kyrisch
    • February 18, 2010

21. Life inside a black hole???

    By 36grit, December 12, 2011
    • 6 replies
    • 1.6k views
    • 
    • Airbrush
    • December 16, 2011

22. The speed of the expansion of the universe at the beginning?

    By noctua, January 13, 2015
    • 8 replies
    • 1.6k views
    • 
    • Spyman
    • March 11, 2015

23. charge neutrality => matter / antimatter symmetry ?

    By Widdekind, January 22, 2012
    • 8 replies
    • 1.6k views
    • 
    • Airbrush
    • January 24, 2012

24. Matter travelling faster than speed of light

    By Ayden, February 7, 2021
    • 11 replies
    • 1.6k views
    • 
    • Ayden
    • February 11, 2021

25. entangled galaxies?

    By ydoaPs, November 3, 2004
    • 9 replies
    • 1.6k views
    • 
    • 1veedo
    • November 5, 2004