Astronomy and Cosmology

3686 topics in this forum

1. What caused the big bang?

   By Genecks, May 4, 2014
   • 13 replies
   • 2.5k views
   • 
   • petrushka.googol
   • June 1, 2014

2. What color is the sky on Mars?

   By Cosmo_Ken, December 2, 2017
   • 9 replies
   • 2.1k views
   • 
   • Cosmo_Ken
   • December 12, 2017

3. What dates are accepted for the age of the Sun? 1 2 3 4 8

   By Robittybob1, February 9, 2016
   • 195 replies
   • 13.2k views
   • 
   • hypervalent_iodine
   • February 23, 2016

4. What decides longitude zero ?

   By Externet, July 14, 2015
   • 6 replies
   • 1.3k views
   • 
   • MonDie
   • July 17, 2015

5. What determines the direction the "disk" shape faces of galaxys and solarsystems?

   By Banshii, April 5, 2013
   • 5 replies
   • 1.2k views
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   • Enthalpy
   • April 6, 2013

6. What dictates the size of a star?

   By Kurious12, April 29, 2022
   • 13 replies
   • 1.3k views
   • 
   • swansont
   • July 12, 2022

7. What direction is the big bang? (split from telescope looking at a distant star)

   By nullus, November 23, 2014
   • 12 replies
   • 1.7k views
   • 
   • swansont
   • November 27, 2014

8. What do you think about Proxima b?

   By alfa015, April 5, 2017
   • 3 replies
   • 1.3k views
   • 
   • alfa015
   • April 5, 2017

9. What do you think about sending radioactive waste to sun...?

   By Ikabot, February 20, 2012
   • 21 replies
   • 2.4k views
   • 
   • John Cuthber
   • March 2, 2012

10. What do you think of this possible explanation of the red staining seen on Europa and a possible test for life on Europa?

    By gedsaz, September 12, 2017
    • 1 reply
    • 729 views
    • 
    • beecee
    • September 13, 2017

11. What does it look like now?

    By Mart, January 26, 2005
    • 11 replies
    • 1.6k views
    • 
    • Verusamore
    • January 28, 2005

12. What does this phrase mean? [about "energy density fluctuations"]

    By Baby Astronaut, December 13, 2008
    • 1 reply
    • 910 views
    • 
    • Martin
    • December 13, 2008

13. What Effects Would Slowing Down the Moon Have on the Earth? - A Universe Sandbox Experiment.

    By CazzaBrank, December 11, 2015
    • 7 replies
    • 1.3k views
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    • Phi for All
    • December 11, 2015

14. What elements, minerals, or just molecules do star forming ' MOLECULAR GAS CLOUDS' contain , as they start a Star Birth? 1 2

    By Mike Smith Cosmos, November 17, 2015
    • 42 replies
    • 4.9k views
    • 
    • Mike Smith Cosmos
    • November 30, 2015

15. What exactly is Gravity? 1 2

    By Arjun Artro, November 30, 2012
    • 27 replies
    • 4.3k views
    • 
    • juanrga
    • December 5, 2012

16. What Exactly is the Fourth Dimension?

    By Arthur d. S. Jr., November 29, 2016
    • 24 replies
    • 3.8k views
    • 
    • AbstractDreamer
    • December 3, 2016

17. What gives the 4D universe its persistence?

    By Genecks, July 26, 2014
    • 10 replies
    • 1.4k views
    • 
    • hoola
    • July 27, 2014

18. What happen before the Big Bang? 1 2

    By LostLabyrinths, August 23, 2008
    • 30 replies
    • 3.1k views
    • 
    • Edtharan
    • August 26, 2008

19. What happened before the big bang?

    By Vexen, March 16, 2019
    • 7 replies
    • 942 views
    • 
    • Phi for All
    • March 16, 2019

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

    By Martin, September 8, 2007
    • 17 replies
    • 2.8k views
    • 
    • Martin
    • March 9, 2008

21. what happened to...

    By japan rocks/andromeda, April 20, 2010
    • 3 replies
    • 1.1k views
    • 
    • Airbrush
    • April 22, 2010

22. what happens to electrons in the sun?

    By lemur, March 14, 2011
    • 6 replies
    • 5.2k views
    • 
    • swansont
    • March 15, 2011

23. What happens to the energy emitted by the Sun?

    By ravell, April 30, 2017
    • 3 replies
    • 1k views
    • 
    • EdEarl
    • April 30, 2017

24. What happens when the light from the center of the universe catches up with us?

    By Sean Bodey, March 7, 2013
    • 6 replies
    • 1.6k views
    • 
    • Chrispen Evan
    • March 14, 2013

25. What if Cosmic Structure ceased expanding?

    By Widdekind, December 1, 2012
    • 2 replies
    • 1.2k views
    • 
    • Widdekind
    • December 7, 2012