Astronomy and Cosmology

3708 topics in this forum

1. Black Holes

   By jasonatron, January 8, 2010
   • 19 replies
   • 2.3k views
   • 
   • eoinmac
   • January 12, 2010

2. Expansion, Light, Redshift and Dark Energy

   By Prophet12, July 3, 2013
   • 24 replies
   • 2.3k views
   • 
   • hypervalent_iodine
   • July 4, 2013

3. Geomagnetics/magnetics

   By Gant, July 22, 2004
   • 10 replies
   • 2.3k views
   • 
   • tecvia
   • February 25, 2011

4. Matter, Anti Matter, and Dark Matter

   By Basi, May 27, 2011
   • 6 replies
   • 2.3k views
   • 
   • BJC
   • May 28, 2011

5. Range of the electromagnetic waves?

   By dapifo, June 28, 2012
   • 17 replies
   • 2.3k views
   • 
   • dapifo
   • July 5, 2012

6. Private Space Satellite Project

   By JohnCli, March 6, 2013
   • 9 replies
   • 2.3k views
   • 
   • JohnCli
   • March 21, 2013

7. Ufology "giggle factor" and SETI

   By alt_f13, August 21, 2003
   • 12 replies
   • 2.3k views
   • 
   • alt_f13
   • August 24, 2003

8. Can gravitational waves be affected by matter?

   By Ghideon, May 21, 2019
   • 23 replies
   • 2.3k views
   • 
   • swansont
   • July 25, 2019

9. Where are the Stars?

   By YT2095, April 1, 2004
   • 15 replies
   • 2.3k views
   • 
   • Alexa
   • September 12, 2004

10. WMAP5 data is out, check implications for cosmology

    By Martin, March 5, 2008
    • 10 replies
    • 2.3k views
    • 
    • Arch2008
    • October 16, 2008

11. Speaking of 2012.

    By Greatest I am, March 2, 2011
    • 9 replies
    • 2.3k views
    • 
    • MattyT
    • May 14, 2011

12. Molecular hydrogene or dark matter

    By Jacques, June 14, 2005
    • 15 replies
    • 2.3k views
    • 
    • Spyman
    • June 22, 2005

13. "clumps" of Cold Neutrinos = Dark Matter ??

    By Widdekind, April 25, 2010
    • 8 replies
    • 2.3k views
    • 
    • insane_alien
    • June 2, 2010

14. Know any good schools?

    By dstebbins, February 19, 2006
    • 19 replies
    • 2.3k views
    • 
    • JustStuit
    • February 27, 2006

15. How did time flow at the moment of the Big Bang?

    By Alan McDougall, June 30, 2012
    • 20 replies
    • 2.3k views
    • 
    • Alan McDougall
    • July 1, 2012

16. Multiple space telescopes inter-coordinated?

    By Baby Astronaut, August 16, 2009
    • 14 replies
    • 2.3k views
    • 
    • Baby Astronaut
    • August 20, 2009

17. definition of a planet

    By dstebbins, August 5, 2007
    • 20 replies
    • 2.3k views
    • 
    • Phi for All
    • August 6, 2007

18. Reviewing some basic concepts...

    By MaxCathedral, August 29, 2004
    • 13 replies
    • 2.3k views
    • 
    • Thales
    • September 4, 2004

19. Wana Believe/Reject Space Bending Theories ?

    By Deviation, June 5, 2005
    • 19 replies
    • 2.3k views
    • 
    • blike
    • June 6, 2005

20. Location of Pioneer 1 & 2

    By Nero, June 9, 2018
    • 23 replies
    • 2.3k views
    • 
    • swansont
    • June 15, 2018

21. Killer Asteroids

    By JohnC, May 19, 2014
    • 13 replies
    • 2.3k views
    • 
    • Airbrush
    • May 31, 2014

22. Slingshot Effect

    By Sarahisme, April 4, 2005
    • 19 replies
    • 2.3k views
    • 
    • Sarahisme
    • April 5, 2005

23. A part of gravity that doesn't make sense to me.

    By NIN, November 16, 2008
    • 12 replies
    • 2.3k views
    • 
    • D H
    • October 4, 2009

24. Is the universe infinite in size

    By noz92, July 31, 2004
    • 10 replies
    • 2.3k views
    • 
    • MOTP
    • December 12, 2004

25. Accelerating universe and dark matter

    By Forsmann, May 24, 2010
    • 9 replies
    • 2.3k views
    • 
    • Airbrush
    • August 18, 2010