Astronomy and Cosmology

3713 topics in this forum

1. Infinite mass?

   By Anura, June 9, 2010
   • 12 replies
   • 2.4k views
   • 
   • swansont
   • June 11, 2010

2. How do we see "old" galaxies? 1 2

   By zapatos, May 18, 2010
   • 31 replies
   • 4.4k views
   • 
   • michel123456
   • June 9, 2010

3. Nuetron-stars

   By Anura, June 8, 2010
   • 3 replies
   • 1.1k views
   • 
   • Airbrush
   • June 9, 2010

4. ????

   By rigney, June 7, 2010
   • 5 replies
   • 1.5k views
   • 
   • rigney
   • June 7, 2010

5. Black holes

   By kavlas, June 7, 2010
   • 2 replies
   • 1.1k views
   • 
   • kavlas
   • June 7, 2010

6. what is expanding?

   By Johanluus, June 1, 2010
   • 20 replies
   • 3.5k views
   • 
   • michel123456
   • June 6, 2010

7. Parallel Lines #2

   By rigney, June 3, 2010
   • 4 replies
   • 1k views
   • 
   • rigney
   • June 5, 2010

8. What Is The Quasar?

   By KuaRk(t), May 6, 2010
   • 13 replies
   • 2.1k views
   • 
   • rigney
   • June 4, 2010

9. Mass of Cosmic Bodies - How Are They Estimated?

   By jimmydasaint, June 3, 2010
   • 2 replies
   • 863 views
   • 
   • jimmydasaint
   • June 4, 2010

10. "clumps" of Cold Neutrinos = Dark Matter ??

    By Widdekind, April 25, 2010
    • 8 replies
    • 2.4k views
    • 
    • insane_alien
    • June 2, 2010

11. Lots of good astronomy documentaries

    By CaptainPanic, May 31, 2010
    • 2 replies
    • 2.7k views
    • 
    • Nano
    • May 31, 2010

12. Black Hole, maybe?

    By rigney, May 26, 2010
    • 9 replies
    • 1.8k views
    • 
    • Nano
    • May 31, 2010

13. The Role of Gravity

    By OSHMUNNIES, April 21, 2010
    • 11 replies
    • 2.2k views
    • 
    • Nano
    • May 29, 2010

14. Quibbles with the balloon analogy

    By michel123456, January 8, 2010
    • 22 replies
    • 5.2k views
    • 
    • J.C.MacSwell
    • May 28, 2010

15. Quick Q about the Hubble Constant

    By Leader Bee, May 28, 2010
    • 5 replies
    • 1.2k views
    • 
    • michel123456
    • May 28, 2010

16. Parallel lines

    By rigney, May 24, 2010
    • 6 replies
    • 1.4k views
    • 
    • rigney
    • May 28, 2010

17. Black Whirpool.

    By Nano, May 22, 2010
    • 4 replies
    • 1.4k views
    • 
    • Spyman
    • May 24, 2010

18. Chat with hot singularities in your area

    By TrumpetPlayer, May 20, 2010
    • 10 replies
    • 1.6k views
    • 
    • Nano
    • May 23, 2010

19. Galaxies, nebula, and what they look like

    By brakeb, May 20, 2010
    • 4 replies
    • 1.1k views
    • 
    • Nano
    • May 22, 2010

20. Black Hole

    By catcow1964, April 21, 2010
    • 4 replies
    • 1.2k views
    • 
    • Airbrush
    • May 19, 2010

21. Cosmology theory

    By adrianos, May 15, 2010
    • 6 replies
    • 1.4k views
    • 
    • insane_alien
    • May 19, 2010

22. Kepler Mission's One Year Anniversary

    By Airbrush, May 12, 2010
    • 1 reply
    • 755 views
    • 
    • Airbrush
    • May 19, 2010

23. Need advice regarding telescope magnification

    By Mukilab, May 12, 2010
    • 0 replies
    • 833 views
    • 
    • Mukilab
    • May 12, 2010

24. FYI ESA's Herschel

    By Arch2008, May 11, 2010
    • 0 replies
    • 892 views
    • 
    • Arch2008
    • May 11, 2010

25. Expansion and Contraction of the Universe

    By TheBigCrunch, May 7, 2010
    • 2 replies
    • 1.8k views
    • 
    • FooFiFum
    • May 10, 2010