Astronomy and Cosmology

3689 topics in this forum

1. why there is no water om moon if,,,, it is aftermath of collision between earth and theia

   By qasimchef, October 22, 2016
   • 2 replies
   • 831 views
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   • Ophiolite
   • October 22, 2016

2. Modern Cosmology

   By sridharanr, September 30, 2008
   • 0 replies
   • 830 views
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   • sridharanr
   • September 30, 2008

3. Are irregular satellites defined as those with asymmetric albedo patterns?

   By vertigonight, March 18, 2005
   • 1 reply
   • 828 views
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   • Ophiolite
   • March 19, 2005

4. My dad bought a meteorite on ebay

   By maddognoland, August 8, 2011
   • 1 reply
   • 828 views
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   • imatfaal
   • August 9, 2011

5. Light and black holes

   By billasker, February 12, 2018
   • 2 replies
   • 828 views
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   • beecee
   • February 13, 2018

6. Dark matter mystery.

   By AlexandrKushnirtshuk, May 27, 2021
   • 3 replies
   • 828 views
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   • Phi for All
   • May 27, 2021

7. Does cosmic expansion ever end?

   By geordief, July 28, 2022
   • 7 replies
   • 828 views
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   • Airbrush
   • August 14, 2022

8. If any of these definitions are wrong, please let me know

   By Johnny5, April 25, 2005
   • 2 replies
   • 827 views
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   • Johnny5
   • April 25, 2005

9. FYI ESA's Herschel

   By Arch2008, May 11, 2010
   • 0 replies
   • 827 views
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   • Arch2008
   • May 11, 2010

10. Gamma Ray Burst's and Earth's Atmo

    By steevey, November 29, 2010
    • 1 reply
    • 827 views
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    • Arch2008
    • November 29, 2010

11. Clearsky Reclamation Sciences Business Plan (yeah, right)

    By Realitycheck, January 27, 2012
    • 0 replies
    • 827 views
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    • Realitycheck
    • January 27, 2012

12. Orbital Decay

    By SaganWannaBeWannaBe, April 14, 2014
    • 1 reply
    • 827 views
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    • swansont
    • April 14, 2014

13. How do we know that the universe is expanding when it could be simply stretching?

    By Achilles, August 16, 2018
    • 5 replies
    • 827 views
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    • beecee
    • August 20, 2018

14. engineering and cosmology

    By fencewalker, April 4, 2018
    • 7 replies
    • 826 views
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    • Airbrush
    • April 5, 2018

15. Is there more to light than meets the eye ?

    By purintjp, March 19, 2009
    • 4 replies
    • 825 views
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    • swansont
    • March 19, 2009

16. AIM/Yahoo users?

    By Guest, January 1, 1970
    • 0 replies
    • 824 views
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    • Guest
    • January 1, 1970

17. Quackery in Today's Cosmology

    By Guest, January 1, 1970
    • 0 replies
    • 824 views
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    • Guest
    • January 1, 1970

18. Alien spaceship called 'speeding star'

    By Guest, January 1, 1970
    • 0 replies
    • 823 views
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    • Guest
    • January 1, 1970

19. black hole entropy

    By dstebbins, June 4, 2007
    • 2 replies
    • 822 views
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    • dstebbins
    • June 5, 2007

20. Even Thin Galaxies Can Grow Fat Black Holes

    By Dr. Spitzer, January 13, 2008
    • 0 replies
    • 822 views
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    • Dr. Spitzer
    • January 13, 2008

21. Mars Clock Delay

    By Raider5678, January 4, 2018
    • 4 replies
    • 822 views
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    • Janus
    • January 4, 2018

22. How do we know at all what "should" have happened at the big bang?

    By questionposter, September 26, 2011
    • 1 reply
    • 821 views
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    • Schrödinger's hat
    • September 26, 2011

23. Is LIGO just observing viscosity of the vacuum?

    By Duda Jarek, April 19, 2009
    • 0 replies
    • 820 views
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    • Duda Jarek
    • April 19, 2009

24. The Perpetual Black Donut Theory

    By Lkreyna2, October 19, 2009
    • 0 replies
    • 820 views
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    • Lkreyna2
    • October 19, 2009

25. Why would the uniform expansion of space produce redshift?

    By Aiden, June 28, 2012
    • 2 replies
    • 820 views
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    • Greg H.
    • June 28, 2012