Astronomy and Cosmology

3686 topics in this forum

1. What is the difference between Dark Matter and Dark Energy?

   By mlich, December 4, 2006
   • 5 replies
   • 2.2k views
   • 
   • Airbrush
   • November 13, 2009

2. What is the energy of the Universe?

   By Eren, July 25, 2017
   • 2 replies
   • 807 views
   • 
   • Mordred
   • July 26, 2017

3. what is the entropy of a black hole ?

   By devrimci_kürt, November 11, 2009
   • 8 replies
   • 1.4k views
   • 
   • ajb
   • November 13, 2009

4. What is the height of Jupiter's atmsophere?

   By seriously disabled, August 27, 2010
   • 15 replies
   • 2.8k views
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   • Ophiolite
   • September 23, 2010

5. What is the mathematical equation for the best-fit model of CMB power spectrum?

   By awu, June 3, 2014
   • 6 replies
   • 1.7k views
   • 
   • awu
   • June 5, 2014

6. What is the maximum mass of a black hole? Could it be the source of the big bang?

   By László Hajós, September 14, 2018
   • 2 replies
   • 638 views
   • 
   • Strange
   • September 14, 2018

7. What is the mechanism for SPACE EXPANSION ?

   By Marius, January 2, 2022
   • 15 replies
   • 1.3k views
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   • Phi for All
   • January 5, 2022

8. What is the mechanism for the BIG BANG ?

   By Marius, January 3, 2022
   • 13 replies
   • 760 views
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   • Ghideon
   • January 3, 2022

9. What is the methodology for concluding accelerated expansion?

   By Cosmo_Ken, December 12, 2017
   • 6 replies
   • 1.6k views
   • 
   • T. McGrath
   • December 14, 2017

10. what is the next step after rockets?

    By awlaskov, October 27, 2010
    • 12 replies
    • 2.7k views
    • 
    • Skaffen
    • November 9, 2010

11. What is the order of magnitude of the mass of photons?

    By petrushka.googol, October 7, 2013
    • 1 reply
    • 856 views
    • 
    • swansont
    • October 7, 2013

12. What Is The Quasar?

    By KuaRk(t), May 6, 2010
    • 13 replies
    • 1.8k views
    • 
    • rigney
    • June 4, 2010

13. What is the rate at which a black hole's gravity weakens as one gets further away?

    By arknd, January 29, 2013
    • 7 replies
    • 1.7k views
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    • Airbrush
    • February 4, 2013

14. What is the Sun's affect on Earth's orbit

    By Bluemoon, October 6, 2014
    • 5 replies
    • 1.3k views
    • 
    • Bluemoon
    • October 13, 2014

15. what is the universe expanding into? 1 2 3 4 5

    By cameron marical, January 24, 2009
    • 105 replies
    • 12.2k views
    • 
    • Martin
    • March 30, 2009

16. What is the universe?

    By PrimalMinister, May 23, 2019
    • 22 replies
    • 1.5k views
    • 
    • The Shadow
    • July 10, 2019

17. what is the value of the acceleration of the expansion of the universe?

    By stephaneww, April 28, 2022
    • 0 replies
    • 546 views
    • 
    • stephaneww
    • April 28, 2022

18. What is this "fundamental pure number" please ?

    By stephaneww, June 27, 2020
    • 3 replies
    • 893 views
    • 
    • stephaneww
    • June 29, 2020

19. What is this Bull **** ?

    By Guest, January 1, 1970
    • 0 replies
    • 1.1k views
    • 
    • Guest
    • January 1, 1970

20. What is this moving light in the sky?

    By Jerry Wickey, September 5, 2013
    • 22 replies
    • 41.9k views
    • 
    • rangerx
    • July 7, 2018

21. What is Time? 1 2 3 4

    By Alan McDougall, July 2, 2012
    • 78 replies
    • 8.8k views
    • 
    • anotherfilthyape
    • December 1, 2012

22. what is time? 1 2 3

    By dad, April 11, 2016
    • 64 replies
    • 5.8k views
    • 
    • swansont
    • April 12, 2016

23. What is Trajectory Deflection Angle

    By Bjarne, January 26, 2014
    • 6 replies
    • 1.7k views
    • 
    • Bjarne
    • January 26, 2014

24. What is twinkling m3

    By Pradeepkumar, August 22, 2008
    • 3 replies
    • 946 views
    • 
    • Pradeepkumar
    • September 2, 2008

25. What keeps matter in the unviverse "contained"

    By Money, September 8, 2007
    • 11 replies
    • 1.8k views
    • 
    • pioneer
    • September 9, 2007