Astronomy and Cosmology

3708 topics in this forum

1. What Is The Quasar?

   By KuaRk(t), May 6, 2010
   • 13 replies
   • 2k views
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   • rigney
   • June 4, 2010

2. Pluto-size object at 43 AU

   By Martin, July 29, 2005
   • 11 replies
   • 2k views
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   • Ollie
   • July 31, 2005

3. Heavy elements ?

   By Dart15, October 13, 2011
   • 8 replies
   • 2k views
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   • Genius13
   • October 18, 2011

4. How would the universe be different if π = 3?

   By Alan McDougall, July 16, 2012
   • 18 replies
   • 2k views
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   • D H
   • July 18, 2012

5. Life Near a Red Dwarf Star

   By Airbrush, March 31, 2021
   • 11 replies
   • 2k views
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   • Airbrush
   • April 13, 2021

6. 8 minutes for the Sun's light to reach the earth?

   By dstebbins, February 23, 2010
   • 11 replies
   • 2k views
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   • Iggy
   • March 5, 2010

7. Dark Energy

   By Advaithi, April 15, 2011
   • 6 replies
   • 2k views
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   • Spyman
   • April 26, 2011

8. Preferred reference frame

   By J.C.MacSwell, March 21, 2005
   • 9 replies
   • 2k views
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   • Johnny5
   • March 29, 2005

9. Chance to see a major asteroid impact. On Mars.

   By insane_alien, December 21, 2007
   • 9 replies
   • 2k views
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   • Kedas
   • January 10, 2008

10. cosmology the new theology

    By velo, April 28, 2007
    • 8 replies
    • 2k views
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    • Severian
    • May 1, 2007

11. Question on gravity

    By n_ka15, August 26, 2007
    • 15 replies
    • 2k views
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    • sammyooba
    • August 28, 2007

12. how much of the outer universe can we see from where we are?

    By boo, October 21, 2020
    • 14 replies
    • 2k views
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    • Airbrush
    • November 2, 2020

13. varying fine structure constant

    By BJC, May 31, 2011
    • 4 replies
    • 1.9k views
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    • JCP
    • June 4, 2011

14. Undetected asteroids and Earth

    By Cerebus06, October 4, 2017
    • 7 replies
    • 1.9k views
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    • dimreepr
    • October 16, 2017

15. SDSS J102915+ 172927 strange star

    By Ras72, April 24, 2012
    • 8 replies
    • 1.9k views
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    • RichIsnang
    • May 11, 2012

16. Space finite/space infinite/we don't know---which do you believe?

    By Martin, October 22, 2008
    • 14 replies
    • 1.9k views
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    • dichotomy
    • October 24, 2008

17. What is Space? (continued)

    By ccwebb, January 22, 2014
    • 5 replies
    • 1.9k views
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    • Cosmobrain
    • March 5, 2014

18. What measures if any will ever be put in place to defend from asteroids?

    By Juryoku, February 21, 2011
    • 5 replies
    • 1.9k views
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    • Mrs Zeta
    • February 21, 2011

19. Most Distant Object

    By Airbrush, February 25, 2009
    • 14 replies
    • 1.9k views
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    • Martin
    • March 4, 2009

20. Simple question

    By akash shrestha, January 12, 2012
    • 10 replies
    • 1.9k views
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    • mathematic
    • February 5, 2012

21. Red Shift question(s) and Help

    By ccwebb, April 9, 2014
    • 13 replies
    • 1.9k views
    • 
    • Mordred
    • May 7, 2014

22. Dark matter

    By CaptainPanic, April 8, 2009
    • 13 replies
    • 1.9k views
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    • Airbrush
    • April 11, 2009

23. No need for dark energy

    By Jacques, January 11, 2013
    • 13 replies
    • 1.9k views
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    • JohnCli
    • January 16, 2013

24. Astrophysicists Find Solid Evidence for Big Bang Inflation

    By Biodizzle, March 17, 2006
    • 17 replies
    • 1.9k views
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    • Severian
    • April 3, 2006

25. What keeps matter in the unviverse "contained"

    By Money, September 8, 2007
    • 11 replies
    • 1.9k views
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    • pioneer
    • September 9, 2007