Astronomy and Cosmology

3708 topics in this forum

1. Surviving in a Black Hole

   By GlueOn, May 15, 2018
   • 11 replies
   • 1.8k views
   • 
   • icarus2
   • May 17, 2018

2. Where should i start to learn Astronomy.

   By cHIs-, May 15, 2003
   • 7 replies
   • 1.8k views
   • 
   • Loki
   • August 17, 2003

3. Expansion and Contraction of the Universe

   By TheBigCrunch, May 7, 2010
   • 2 replies
   • 1.8k views
   • 
   • FooFiFum
   • May 10, 2010

4. Artificial Gravity and Spacetravel

   By Airbrush, August 16, 2016
   • 15 replies
   • 1.8k views
   • 
   • Airbrush
   • September 3, 2016

5. Expansion and Inflation

   By geordief, December 31, 2017
   • 19 replies
   • 1.8k views
   • 
   • Mordred
   • January 2, 2018

6. black-holes do not exist

   By north, October 29, 2008
   • 16 replies
   • 1.8k views
   • 
   • Mr Skeptic
   • October 29, 2008

7. Astronomy Events

   By herpguy, February 23, 2006
   • 8 replies
   • 1.8k views
   • 
   • Jacques
   • March 27, 2006

8. Nebula Pictures - True colors? Nope...

   By ParanoiA, August 10, 2007
   • 3 replies
   • 1.8k views
   • 
   • insane_alien
   • August 10, 2007

9. 'Killer' Asteroids?

   By Moonguy, April 9, 2015
   • 4 replies
   • 1.8k views
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   • Airbrush
   • May 4, 2015

10. Dark Energy vs Fifth Force

    By IM Egdall, May 14, 2012
    • 5 replies
    • 1.8k views
    • 
    • space noob
    • May 16, 2012

11. Dark Energy

    By Norman Albers, January 24, 2007
    • 13 replies
    • 1.8k views
    • 
    • Norman Albers
    • February 19, 2007

12. Split time

    By herme3, December 6, 2004
    • 13 replies
    • 1.8k views
    • 
    • MadScientist
    • December 14, 2004

13. Black Holes

    By Kelnad, February 26, 2015
    • 7 replies
    • 1.8k views
    • 
    • pzkpfw
    • March 11, 2015

14. Can ETs Detect Voyager?

    By Airbrush, July 16, 2013
    • 14 replies
    • 1.8k views
    • 
    • dimreepr
    • July 26, 2013

15. Most simple elementary particle combination for the big bang.

    By Sorcerer, June 7, 2015
    • 15 replies
    • 1.8k views
    • 
    • Strange
    • June 7, 2015

16. Rippling Crab Nebula

    By Martin, March 27, 2005
    • 8 replies
    • 1.8k views
    • 
    • swansont
    • March 28, 2005

17. time and space

    By jamey2k9, February 1, 2009
    • 11 replies
    • 1.8k views
    • 
    • Airbrush
    • February 3, 2009

18. Supernovae and time

    By ydoaPs, May 17, 2012
    • 6 replies
    • 1.8k views
    • 
    • ydoaPs
    • May 20, 2012

19. Oumuamua - mathematical question

    By DeckerdSmeckerd, November 14, 2021
    • 22 replies
    • 1.8k views
    • 
    • DeckerdSmeckerd
    • November 16, 2021

20. Long space journeys; Solar radiation shielding

    By 25Hz, December 4, 2012
    • 6 replies
    • 1.8k views
    • 
    • mr.spaceman
    • December 22, 2012

21. Hubble_constant_debate

    By es111, December 7, 2016
    • 18 replies
    • 1.8k views
    • 
    • Mordred
    • December 9, 2016

22. Gravitation and refraction.

    By Гера�им, October 21, 2014
    • 10 replies
    • 1.8k views
    • 
    • Mordred
    • October 23, 2014

23. Big Bang

    By herme3, July 18, 2005
    • 17 replies
    • 1.7k views
    • 
    • swansont
    • July 19, 2005

24. Eris and Dysnomia (Discord and Lawlessness)---it's official as of 13 Sept

    By Martin, September 14, 2006
    • 10 replies
    • 1.7k views
    • 
    • Daymare17
    • September 23, 2006

25. Black Holes and Gravity

    By sansavis, August 22, 2011
    • 5 replies
    • 1.7k views
    • 
    • csmyth3025
    • August 22, 2011