Astronomy and Cosmology

3708 topics in this forum

1. Gravity Fueling the Expansion of the Universe

   By AbnormallyHonest, June 28, 2017
   • 21 replies
   • 2.4k views
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   • AbnormallyHonest
   • June 28, 2017

2. More than one Big Bang Theory

   By jmbgouveia, October 4, 2012
   • 7 replies
   • 2.4k views
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   • IM Egdall
   • October 7, 2012

3. Dark Matter and Compton wavelengths

   By LaurieAG, August 28, 2012
   • 5 replies
   • 2.4k views
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   • LaurieAG
   • September 5, 2012

4. Retiring the Hubble?

   By matter, February 15, 2004
   • 16 replies
   • 2.4k views
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   • SolarFlare
   • September 19, 2004

5. big bang theory

   By silentriot, September 13, 2005
   • 17 replies
   • 2.4k views
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   • Hellbender
   • September 16, 2005

6. Gravity issues

   By GeeKay, August 22, 2014
   • 23 replies
   • 2.4k views
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   • imatfaal
   • August 28, 2014

7. A Neptune Mass Planet in the Oort Cloud

   By Astrobuff, June 30, 2007
   • 7 replies
   • 2.4k views
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   • Ophiolite
   • July 5, 2007

8. How can the vacuum of space be "empty"

   By Lightmeow, March 7, 2014
   • 12 replies
   • 2.4k views
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   • pantheory
   • March 8, 2014

9. rocket power

   By Guy34life, June 23, 2003
   • 16 replies
   • 2.4k views
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   • YT2095
   • February 24, 2004

10. Unknown Spectral Lines in Sunlight

    By EdEarl, March 19, 2015
    • 18 replies
    • 2.4k views
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    • John Cuthber
    • March 19, 2015

11. Passing Stars

    By BearOfNH, February 28, 2013
    • 6 replies
    • 2.4k views
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    • Spyman
    • March 6, 2013

12. Gravity

    By science worm, August 28, 2011
    • 8 replies
    • 2.4k views
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    • csmyth3025
    • September 6, 2011

13. Distances of deep space objects

    By UncleJoe, March 16, 2012
    • 19 replies
    • 2.4k views
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    • JohnStu
    • April 9, 2012

14. Betelgeuse might blow up.

    By Martin, June 22, 2009
    • 6 replies
    • 2.4k views
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    • fottry55i6
    • January 7, 2010

15. Universal Expansion

    By Trajk Logik, June 4, 2011
    • 9 replies
    • 2.4k views
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    • pantheory
    • July 1, 2011

16. The Hubble 'Scope

    By admiral_ju00, April 25, 2004
    • 10 replies
    • 2.4k views
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    • admiral_ju00
    • July 16, 2004

17. Absolute coordinates in the univers

    By Edgard Neuman, August 12, 2013
    • 7 replies
    • 2.4k views
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    • imatfaal
    • August 23, 2013

18. Some easy questions about space

    By luke, February 25, 2011
    • 3 replies
    • 2.3k views
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    • Airbrush
    • March 9, 2011

19. Seeing Light That Travels Away From Us

    By herme3, April 28, 2006
    • 16 replies
    • 2.3k views
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    • Ragib
    • May 11, 2006

20. rotational gravity

    By gobblegobble, August 29, 2003
    • 13 replies
    • 2.3k views
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    • YT2095
    • August 29, 2003

21. van der Waals effects in stars ?

    By Widdekind, July 22, 2013
    • 22 replies
    • 2.3k views
    • 
    • Widdekind
    • August 8, 2013

22. Can you witness the birth of the Universe?

    By Madheart918, January 8, 2018
    • 15 replies
    • 2.3k views
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    • MigL
    • January 16, 2018

23. Dark Matter and the Initial Mass Function

    By Widdekind, June 9, 2009
    • 9 replies
    • 2.3k views
    • 
    • Leif
    • August 22, 2013

24. Expanding space ?

    By Dart15, September 1, 2009
    • 12 replies
    • 2.3k views
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    • rrw4rusty
    • October 1, 2009

25. Galaxy Star Formation max @ Scutum,Norma arms ?

    By Widdekind, August 31, 2009
    • 2 replies
    • 2.3k views
    • 
    • Widdekind
    • April 18, 2011