Astronomy and Cosmology

3709 topics in this forum

1. Crater scaling-laws

   By Widdekind, May 5, 2011
   • 0 replies
   • 1.4k views
   • 
   • Widdekind
   • May 5, 2011

2. Universe from nothing.

   By praty, April 27, 2011
   • 12 replies
   • 2.8k views
   • 
   • rktpro
   • May 3, 2011

3. Cosmic Horizons

   By BJC, April 29, 2011
   • 4 replies
   • 1.6k views
   • 
   • BJC
   • May 1, 2011

4. Asteroid mining

   By lemur, April 27, 2011
   • 11 replies
   • 2.3k views
   • 
   • Moontanman
   • April 28, 2011

5. The Moving Universe

   By sfphysics, April 27, 2011
   • 5 replies
   • 1.4k views
   • 
   • Airbrush
   • April 27, 2011

6. Question about Planetary Formation

   By Widdekind, August 22, 2009
   • 14 replies
   • 2k views
   • 
   • Ophiolite
   • April 27, 2011

7. Dark Energy

   By Advaithi, April 15, 2011
   • 6 replies
   • 2k views
   • 
   • Spyman
   • April 26, 2011

8. SM BHs, Quasars, & Starburst galaxies

   By Widdekind, April 15, 2011
   • 2 replies
   • 1.5k views
   • 
   • Widdekind
   • April 24, 2011

9. estimating Europa's ice-crust thickness

   By Widdekind, April 17, 2011
   • 3 replies
   • 3.3k views
   • 
   • Widdekind
   • April 24, 2011

10. Accelerated Charges act like Off-Gassing Comets

    By Widdekind, April 20, 2011
    • 2 replies
    • 965 views
    • 
    • Ophiolite
    • April 20, 2011

11. Shape of a black hole?

    By Vay, April 4, 2011
    • 20 replies
    • 6.3k views
    • 
    • Spyman
    • April 20, 2011

12. Galaxy Star Formation max @ Scutum,Norma arms ?

    By Widdekind, August 31, 2009
    • 2 replies
    • 2.3k views
    • 
    • Widdekind
    • April 18, 2011

13. early on, Gravity was radically non-Newtonian ??

    By Widdekind, April 15, 2011
    • 5 replies
    • 1.4k views
    • 
    • Widdekind
    • April 18, 2011

14. capabilities of satellite

    By Ivan Tuzikov, April 16, 2011
    • 3 replies
    • 984 views
    • 
    • Klaynos
    • April 16, 2011

15. Black Hole Complementarity

    By laifuthegreat, April 14, 2011
    • 3 replies
    • 1.4k views
    • 
    • Spyman
    • April 15, 2011

16. see through matter and space

    By Ivan Tuzikov, April 4, 2011
    • 10 replies
    • 1.5k views
    • 
    • Ivan Tuzikov
    • April 14, 2011

17. Gravity range?

    By iAmSchrodinger'sCAT, April 11, 2011
    • 4 replies
    • 1.4k views
    • 
    • lemur
    • April 14, 2011

18. condensed dust seeds planet formation ?

    By Widdekind, April 14, 2011
    • 0 replies
    • 1.1k views
    • 
    • Widdekind
    • April 14, 2011

19. cosmos-crossing photons vs. quantum foam ?

    By Widdekind, April 14, 2011
    • 0 replies
    • 730 views
    • 
    • Widdekind
    • April 14, 2011

20. Corona Temperature

    By jimmydasaint, April 11, 2011
    • 5 replies
    • 1.5k views
    • 
    • ecoli
    • April 13, 2011

21. Antimatter Rocket Speed

    By Jon0815, April 11, 2011
    • 6 replies
    • 3.1k views
    • 
    • Neotropic
    • April 13, 2011

22. Coronal Mass Ejections

    By jamiestem, April 11, 2011
    • 2 replies
    • 1.2k views
    • 
    • jamiestem
    • April 13, 2011

23. Cosmic Microwave Background Anisotropies

    By BJC, April 4, 2011
    • 3 replies
    • 1.4k views
    • 
    • Spyman
    • April 5, 2011

24. Why are planets spherical? Why are molecules spherical? 1 2

    By jamiestem, March 30, 2011
    • 40 replies
    • 6.4k views
    • 
    • lemur
    • April 2, 2011

25. Water on Mercury?

    By sysD, March 30, 2011
    • 18 replies
    • 3.6k views
    • 
    • CaptainPanic
    • March 31, 2011