Astronomy and Cosmology

3708 topics in this forum

1. The 10th planet theory.

   By chris, July 9, 2002
   • 18 replies
   • 3k views
   • 
   • Radical Edward
   • July 31, 2002

2. Big Bang question(s)

   By Dekan, April 29, 2013
   • 22 replies
   • 3k views
   • 
   • imatfaal
   • May 15, 2013

3. What is the height of Jupiter's atmsophere?

   By seriously disabled, August 27, 2010
   • 15 replies
   • 3k views
   • 
   • Ophiolite
   • September 23, 2010

4. Neutron Stars - re 'Dragon's Egg'

   By GeeKay, August 16, 2013
   • 21 replies
   • 3k views
   • 
   • imatfaal
   • September 3, 2013

5. Our nearest star other than the sun??

   By Pradeepkumar, August 13, 2008
   • 10 replies
   • 3k views
   • 
   • Phi for All
   • September 2, 2008

6. 30% of Nuclear Arsenals, for what?

   By Airbrush, April 14, 2010
   • 21 replies
   • 3k views
   • 
   • Airbrush
   • April 16, 2010

7. Expansion, collapse, or both.

   By Piltdown man, May 29, 2009
   • 23 replies
   • 3k views
   • 
   • Martin
   • June 3, 2009

8. Hypervelocity Supermassive Black Hole 1 2

   By Airbrush, February 6, 2019
   • 32 replies
   • 3k views
   • 
   • swansont
   • February 22, 2019

9. Utilizing Gravity for Space Travel

   By kenel, July 20, 2002
   • 17 replies
   • 2.9k views
   • 
   • Klaynos
   • November 16, 2008

10. Weird thought about gravity...

    By Falkon, December 18, 2008
    • 23 replies
    • 2.9k views
    • 
    • Klaynos
    • December 23, 2008

11. Rendering stars

    By Przemyslaw.Gruchala, March 13, 2013
    • 5 replies
    • 2.9k views
    • 
    • Przemyslaw.Gruchala
    • March 21, 2013

12. Spiral Arms, Supernovae, & Mass Extinctions

    By Widdekind, December 17, 2009
    • 5 replies
    • 2.9k views
    • 
    • Widdekind
    • December 23, 2009

13. What happened before the Big Bang? (professional journal style)

    By Martin, September 8, 2007
    • 17 replies
    • 2.9k views
    • 
    • Martin
    • March 9, 2008

14. Gravity

    By isaacknewtonnes, June 1, 2016
    • 16 replies
    • 2.9k views
    • 
    • swansont
    • July 12, 2016

15. Earth-Sun Gravity Question

    By yonderboy, February 25, 2006
    • 21 replies
    • 2.9k views
    • 
    • sunspot
    • March 2, 2006

16. Night is Earth's Shadow? Negative!

    By Hyun18, August 18, 2013
    • 14 replies
    • 2.9k views
    • 
    • imatfaal
    • August 19, 2013

17. How did all life become developed by the big bang?

    By EmmaWhat, March 3, 2017
    • 21 replies
    • 2.9k views
    • 
    • StringJunky
    • March 19, 2017

18. Gravity wells determine orbital plane? 1 2

    By DeckerdSmeckerd, November 18, 2021
    • 35 replies
    • 2.9k views
    • 
    • Ghideon
    • November 22, 2021

19. Dark Energy Wrong?

    By BiotechFusion, April 27, 2016
    • 24 replies
    • 2.9k views
    • 
    • Mordred
    • May 19, 2016

20. How important is Sun’s rotation on the orbits of the planets?

    By Hello2, August 24, 2018
    • 7 replies
    • 2.9k views
    • 
    • J.C.MacSwell
    • August 28, 2018

21. Universes outside the universe

    By barbie.=^.^=, April 13, 2008
    • 19 replies
    • 2.9k views
    • 
    • Arch2008
    • July 3, 2008

22. Why do we alway say that there has to be water for there to be life?

    By amoda, January 15, 2004
    • 20 replies
    • 2.9k views
    • 
    • [Tycho?]
    • June 13, 2004

23. The Logic Of The Big Bang 1 2

    By PrimalMinister, September 24, 2018
    • 28 replies
    • 2.9k views
    • 
    • Airbrush
    • September 27, 2018

24. Can we see sunspots on other stars?

    By Pradeepkumar, August 22, 2008
    • 7 replies
    • 2.9k views
    • 
    • CaptainPanic
    • August 25, 2008

25. Size of a black hole.

    By Sedit, February 10, 2011
    • 8 replies
    • 2.9k views
    • 
    • steevey
    • February 14, 2011