Astronomy and Cosmology

3708 topics in this forum

1. Some black hole questions, I think I brain is broken.

   By Hoki, May 10, 2013
   • 6 replies
   • 1.6k views
   • 
   • ajb
   • May 20, 2013

2. Quasi-Steady State Model and the Expanding Universe

   By Heisenberg1927, December 23, 2018
   • 10 replies
   • 1.6k views
   • 
   • Carrock
   • December 23, 2018

3. Is there Electric Propulsion?

   By DARK0717, April 7, 2019
   • 17 replies
   • 1.6k views
   • 
   • DARK0717
   • April 16, 2019

4. Anti Gravity theorm

   By Snake_Arts, February 5, 2006
   • 5 replies
   • 1.6k views
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   • Xyph
   • February 14, 2006

5. Rockets

   By skulldude, February 28, 2008
   • 10 replies
   • 1.6k views
   • 
   • Mr Skeptic
   • February 29, 2008

6. Keplers Laws.

   By SweetScientist, February 15, 2012
   • 12 replies
   • 1.6k views
   • 
   • PaulS1950
   • February 19, 2012

7. time,does it have a real physical essence?

   By Guest, January 1, 1970
   • 0 replies
   • 1.6k views
   • 
   • Guest
   • January 1, 1970

8. Where are the rings?

   By ccwebb, August 23, 2013
   • 1 reply
   • 1.6k views
   • 
   • Moontanman
   • August 23, 2013

9. Report Urges U.S. to Pursue Space-Based Solar Power

   By TZH, October 16, 2007
   • 10 replies
   • 1.6k views
   • 
   • Dak
   • October 18, 2007

10. Heat death + dark energy, in regards to the quantum vacuum.

    By Sorcerer, July 26, 2014
    • 5 replies
    • 1.6k views
    • 
    • Mordred
    • August 3, 2014

11. Noob question about universe expansion

    By smeagol69, February 24, 2006
    • 8 replies
    • 1.6k views
    • 
    • s pepperchin
    • February 27, 2006

12. light through medium

    By caalis, April 18, 2008
    • 4 replies
    • 1.6k views
    • 
    • granpa
    • April 27, 2008

13. Interstellar Probes

    By Airbrush, March 23, 2016
    • 13 replies
    • 1.6k views
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    • Enthalpy
    • April 22, 2016

14. Parallel universes.

    By Guest hadeka, November 10, 2004
    • 7 replies
    • 1.6k views
    • 
    • Verusamore
    • December 1, 2004

15. The Sun: Difference in the surface and corona temperature

    By CaptainPanic, November 6, 2009
    • 3 replies
    • 1.6k views
    • 
    • swansont
    • November 16, 2009

16. Re-Post

    By us2u, December 6, 2006
    • 10 replies
    • 1.6k views
    • 
    • us2u
    • December 9, 2006

17. When the sun goes out....

    By frosch45, July 11, 2008
    • 10 replies
    • 1.6k views
    • 
    • Arch2008
    • July 11, 2008

18. Membranes in hyperspace?

    By altairpilot, October 9, 2009
    • 2 replies
    • 1.6k views
    • 
    • shawn77
    • October 17, 2009

19. Space expansion & Virtual Particles

    By Simpleton, December 10, 2013
    • 5 replies
    • 1.6k views
    • 
    • hoola
    • December 15, 2013

20. Mars Closes In

    By IMI, August 23, 2003
    • 3 replies
    • 1.6k views
    • 
    • Kedas
    • August 23, 2003

21. Life on Mars?

    By igosaur, January 15, 2009
    • 7 replies
    • 1.6k views
    • 
    • devrimci_kürt
    • January 16, 2009

22. Velocity

    By The Holy Mol, January 8, 2005
    • 8 replies
    • 1.6k views
    • 
    • Martin
    • January 8, 2005

23. schwarzschild radius

    By young-albert, February 22, 2007
    • 5 replies
    • 1.6k views
    • 
    • Martin
    • March 1, 2007

24. Fusion in a star

    By Realitycheck, December 19, 2007
    • 10 replies
    • 1.6k views
    • 
    • swansont
    • December 19, 2007

25. Heavy radioactive elements in a star

    By Moontanman, April 7, 2017
    • 3 replies
    • 1.6k views
    • 
    • Moontanman
    • July 23, 2017