Astronomy and Cosmology

3708 topics in this forum

1. Evaporation of a black hole

   By afm, November 14, 2014
   • 2 replies
   • 1.2k views
   • 
   • MigL
   • November 14, 2014

2. Event horizon of black holes

   By [Tycho?], June 30, 2004
   • 3 replies
   • 1.2k views
   • 
   • Martin
   • July 1, 2004

3. High energy gamma ray "magic" project

   By fred2014, October 3, 2016
   • 2 replies
   • 1.2k views
   • 
   • fred2014
   • October 4, 2016

4. First image of massive black hole

   By Bmpbmp1975, March 30, 2020
   • 3 replies
   • 1.2k views
   • 
   • Airbrush
   • May 29, 2020

5. anyone here interested in ceres? (not the lights)

   By encidentt, May 19, 2015
   • 3 replies
   • 1.2k views
   • 
   • encident
   • May 24, 2015

6. Singularity Question

   By dylan, February 12, 2008
   • 4 replies
   • 1.2k views
   • 
   • Martin
   • February 13, 2008

7. 1Kg mass = Universe??

   By Daecon, March 15, 2008
   • 1 reply
   • 1.2k views
   • 
   • Martin
   • March 15, 2008

8. How near can we be to a black hole?

   By Airbrush, September 13, 2011
   • 3 replies
   • 1.2k views
   • 
   • CaptainPanic
   • September 19, 2011

9. Universe--A Moment in Time

   By B. John Jones, June 23, 2016
   • 5 replies
   • 1.2k views
   • 
   • swansont
   • June 23, 2016

10. Question about the initial conditions of the universe

    By Johnny5, March 2, 2005
    • 7 replies
    • 1.2k views
    • 
    • Bettina
    • March 4, 2005

11. sky and space

    By skulldude, March 1, 2008
    • 4 replies
    • 1.2k views
    • 
    • Dark matter
    • March 2, 2008

12. Varied Planet composition

    By Vindhya, March 14, 2009
    • 2 replies
    • 1.2k views
    • 
    • D H
    • March 14, 2009

13. Who gets what?

    By Law, March 13, 2010
    • 4 replies
    • 1.2k views
    • 
    • Airbrush
    • March 16, 2010

14. Carl Sagan Tribute

    By BoatsnHoes, October 5, 2011
    • 2 replies
    • 1.2k views
    • 
    • StringJunky
    • October 5, 2011

15. Wandering sun ?

    By Externet, April 10, 2012
    • 3 replies
    • 1.2k views
    • 
    • swansont
    • April 10, 2012

16. Venus is retrograde ? Why ?

    By petrushka.googol, April 5, 2015
    • 1 reply
    • 1.2k views
    • 
    • Robittybob1
    • April 5, 2015

17. Telescopes

    By Bettina, September 5, 2005
    • 6 replies
    • 1.2k views
    • 
    • Bettina
    • September 5, 2005

18. Constellation question

    By Crash, May 22, 2004
    • 3 replies
    • 1.2k views
    • 
    • Crash
    • May 22, 2004

19. Cosmic Ray??

    By DrP, April 7, 2008
    • 6 replies
    • 1.2k views
    • 
    • DrP
    • April 8, 2008

20. was spacetime really created with the Big Bang?

    By gib65, November 16, 2007
    • 6 replies
    • 1.2k views
    • 
    • Martin
    • November 17, 2007

21. A Problem in Cold Dark Matter Theory Resolved?

    By toastywombel, January 14, 2010
    • 1 reply
    • 1.2k views
    • 
    • Martin
    • January 14, 2010

22. Does plasma ever turn into dust?

    By 36grit, December 20, 2011
    • 4 replies
    • 1.2k views
    • 
    • 36grit
    • December 26, 2011

23. Dark Matter:

    By beecee, December 18, 2021
    • 6 replies
    • 1.2k views
    • 
    • MigL
    • December 23, 2021

24. Question about redshift etc.

    By blike, October 31, 2006
    • 5 replies
    • 1.2k views
    • 
    • Martin
    • October 31, 2006

25. Big Bang Blasted

    By Edward Duffy, December 28, 2006
    • 3 replies
    • 1.2k views
    • 
    • Sisyphus
    • December 28, 2006