Astronomy and Cosmology

3708 topics in this forum

1. Fire or Ice?

   By MaxCathedral, July 13, 2005
   • 8 replies
   • 1.6k views
   • 
   • danny8522003
   • July 16, 2005

2. Plans for Lunar telescope

   By Royston, March 20, 2008
   • 11 replies
   • 1.6k views
   • 
   • JohnB
   • April 14, 2008

3. Dark matter = Gravity?

   By QuantumT, August 6, 2019
   • 7 replies
   • 1.6k views
   • 
   • QuantumT
   • August 27, 2019

4. Cool Pictures of the Sun

   By apollo2011, December 17, 2003
   • 2 replies
   • 1.6k views
   • 
   • apollo2011
   • December 17, 2003

5. comet formation

   By Stevil, June 22, 2004
   • 4 replies
   • 1.6k views
   • 
   • Martin
   • June 23, 2004

6. Astronomy

   By ydoaPs, July 6, 2004
   • 6 replies
   • 1.6k views
   • 
   • swansont
   • July 6, 2004

7. gravitation?

   By chitrangda, October 10, 2007
   • 6 replies
   • 1.6k views
   • 
   • Sisyphus
   • October 14, 2007

8. ceres

   By japan rocks/andromeda, October 4, 2010
   • 4 replies
   • 1.6k views
   • 
   • DanielC
   • October 4, 2010

9. Seeing Black Holes

   By Airbrush, March 1, 2013
   • 4 replies
   • 1.6k views
   • 
   • Chrispen Evan
   • March 9, 2013

10. What would a neutron star look like?

    By Fanghur, March 10, 2013
    • 4 replies
    • 1.6k views
    • 
    • StringJunky
    • March 11, 2013

11. Witnessing a Galactic Pileup:

    By beecee, April 25, 2018
    • 3 replies
    • 1.6k views
    • 
    • beecee
    • April 26, 2018

12. Is this the Dark Matter Particle?

    By beecee, June 9, 2018
    • 14 replies
    • 1.6k views
    • 
    • YaDinghus
    • June 23, 2018

13. structure of universe

    By young-albert, February 22, 2007
    • 7 replies
    • 1.5k views
    • 
    • young-albert
    • March 1, 2007

14. Exploring Titan

    By Gian, May 10, 2018
    • 4 replies
    • 1.5k views
    • 
    • MigL
    • February 2, 2019

15. time and space

    By *puffy* japanisthebest, May 11, 2011
    • 1 reply
    • 1.5k views
    • 
    • Spyman
    • May 11, 2011

16. Star older than universe

    By Bmpbmp1975, February 14, 2020
    • 9 replies
    • 1.5k views
    • 
    • dimreepr
    • February 16, 2020

17. Light properties in curved space

    By purintjp, July 16, 2009
    • 8 replies
    • 1.5k views
    • 
    • purintjp
    • July 20, 2009

18. infinitesolid2 on universal expansion.

    By infinitesolid2, August 15, 2009
    • 11 replies
    • 1.5k views
    • 
    • Klaynos
    • August 15, 2009

19. Astrophysics prospects?

    By Forensicmad, May 13, 2006
    • 7 replies
    • 1.5k views
    • 
    • Locrian
    • May 18, 2006

20. Shouldn't planets have no core (just shell?)

    By mcpng, October 2, 2011
    • 9 replies
    • 1.5k views
    • 
    • Schrödinger's hat
    • October 8, 2011

21. 1 gram solar sail project

    By fred2014, September 26, 2016
    • 7 replies
    • 1.5k views
    • 
    • fred2014
    • October 3, 2016

22. Clarification of Arch's post

    By Arch2008, October 21, 2008
    • 12 replies
    • 1.5k views
    • 
    • npts2020
    • October 25, 2008

23. Comet or Asteroid smashes into OUR moon!

    By EastNamibianSpaceMiningCo, October 26, 2019
    • 9 replies
    • 1.5k views
    • 
    • Airbrush
    • October 28, 2019

24. Dimensions

    By rebeldog, September 4, 2003
    • 2 replies
    • 1.5k views
    • 
    • jpat1023
    • February 14, 2004

25. enough water vapor to fill the oceans on Earth five times inside the collapsing nest

    By Dr. Spitzer, August 29, 2007
    • 5 replies
    • 1.5k views
    • 
    • Martin
    • September 5, 2007