Astronomy and Space

1,435 topics in this forum

1. Origin of the Universe,,,,Bang or no Bang 1 2 3 4 52

   By Harry Costas, September 3, 2006
   • 879 replies
   • 81.4k views
   • 
   • modest
   • June 2, 2010

2. Redshift z 1 2 3 4 46

   By coldcreation, July 5, 2005
   • 769 replies
   • 116.9k views
   • 
   • LaurieAG
   • December 10, 2014

3. Space Voyage #1 1 2 3 4 37

   By TheBigDog, May 3, 2006
   • 620 replies
   • 66k views
   • 
   • Moontanman
   • March 30, 2008

4. Space Voyage #1 Chatter 1 2 3 4 30

   By Jay-qu, June 5, 2006
   • 500 replies
   • 49.7k views
   • 
   • Pyrotex
   • June 12, 2009

5. Aliens Poll 1 2 3 4 23

   By Buffy, April 24, 2005
   • 374 replies
   • 39.5k views
   • 
   • Moontanman
   • May 5, 2010

6. Photons have no time 1 2 3 4 18

   By InfiniteNow, April 12, 2006
   • 294 replies
   • 29k views
   • 
   • HydrogenBond
   • April 8, 2008

7. The Origin of Universe: Solving the mystery 1 2 3 4 18

   By durgatosh, September 13, 2006
   • 292 replies
   • 31.5k views
   • 
   • capricornicis
   • January 27, 2008

8. Near Earth Objects 1 2 3 4 14

   By Deepwater6, November 4, 2011
   • 236 replies
   • 40.4k views
   • 
   • LaurieAG
   • July 19, 2019

9. Hypography X Prize Entry 1 2 3 4 14

   By TheBigDog, September 15, 2007
   • 234 replies
   • 33.4k views
   • 
   • TheBigDog
   • April 5, 2008

10. Skywatchers' Journal 1 2 3 4 14

    By Turtle, April 22, 2005
    • 229 replies
    • 35.5k views
    • 
    • Turtle
    • September 14, 2011

11. What IS space? 1 2 3 4 13

    By sergey500, September 7, 2005
    • 214 replies
    • 25.1k views
    • 
    • Qfwfq
    • December 10, 2005

12. SNe Ia, Implications, Interpretations, Lambda-CDM... 1 2 3 4 13

    By coldcreation, January 13, 2008
    • 206 replies
    • 22.3k views
    • 
    • Little Bang
    • November 13, 2009

13. Superintelligent Extraterrestrial Life, Accelerated Evolution, And The Fate Of The Universe 1 2 3 4 12

    By Super Polymath, July 30, 2016
    • 197 replies
    • 27.8k views
    • 
    • Super Polymath
    • July 28, 2017

14. What exists beyond the known universe? 1 2 3 4 12

    By Tim_Lou, March 4, 2004
    • 188 replies
    • 79.6k views
    • 
    • maddog
    • March 2, 2005

15. Massless Energy & Nothing. 1 2 3 4 11

    By OmegaX7, April 23, 2005
    • 186 replies
    • 17.4k views
    • 
    • Odin
    • March 2, 2007

16. Is Newtonian Mechanics an advantage or a limitation in astrophysics? 1 2 3 4 11

    By Hilton Ratcliffe, August 8, 2007
    • 186 replies
    • 24.3k views
    • 
    • Hilton Ratcliffe
    • January 18, 2008

17. Spaceship Design 1 2 3 4 11

    By Jay-qu, April 26, 2006
    • 182 replies
    • 22.2k views
    • 
    • CraigD
    • June 28, 2008

18. Is Space Zero Gravity (0 G) 1 2 3 4 11

    By Darky, April 20, 2017   

    • Space
    • Gravity
    • (and 7 more)

      Tagged with:

      • Space
      • Gravity
      • Zero-Gravity
      • Weight
      • Rocket
      • Earth
      • Sun
      • Moon
      • Zero-G
    • 177 replies
    • 20.5k views
    • 
    • Super Polymath
    • May 10, 2017

19. Big Bang Blasted 1 2 3 4 11

    By Eduffy80911, January 16, 2007
    • 174 replies
    • 24.4k views
    • 
    • Pluto
    • October 6, 2007

20. UFO! 1 2 3 4 10

    By Tim_Lou, May 7, 2004
    • 163 replies
    • 24.1k views
    • 
    • Turtle
    • October 1, 2013

21. Terraforming Mars 1 2 3 4 10

    By Thunderbird, March 10, 2008
    • 160 replies
    • 29.2k views
    • 
    • SaxonViolence
    • December 5, 2012

22. Speed of gravity 1 2 3 4 9

    By Jay-qu, July 21, 2005
    • 152 replies
    • 14.8k views
    • 
    • Akw2000
    • October 28, 2005

23. The edge of space 1 2 3 4 9

    By amt7565, May 31, 2005
    • 143 replies
    • 13.9k views
    • 
    • Erasmus00
    • September 8, 2005

24. Ultimate cosmology quiz 1 2 3 4 9

    By BrainForce, July 30, 2006
    • 143 replies
    • 17.3k views
    • 
    • Jay-qu
    • January 10, 2007

25. Are we alone? 1 2 3 4 8

    By sman, February 13, 2010
    • 130 replies
    • 16.5k views
    • 
    • hummingbird
    • September 6, 2010