Astronomy and Cosmology

3708 topics in this forum

1. Astrophotography Contest

   By Eve, November 26, 2014
   • 0 replies
   • 994 views
   • 
   • Eve
   • November 26, 2014

2. Matter/Energy and Space/Time

   By Airbrush, April 13, 2016
   • 1 reply
   • 994 views
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   • Strange
   • April 13, 2016

3. Why do all cosmological models assume time flow is the same for everyone in the universe?

   By Aki Tendo, October 15, 2017
   • 6 replies
   • 994 views
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   • Mordred
   • October 15, 2017

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

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

5. Biggest Bang Since Big Bang

   By Airbrush, March 8, 2020
   • 1 reply
   • 993 views
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   • Airbrush
   • March 26, 2020

6. The universe is infinite and eternal. There is no god.

   By ZGSON, January 27, 2007
   • 1 reply
   • 992 views
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   • Phi for All
   • January 27, 2007

7. Are cosmic particles directional

   By vich, August 6, 2012
   • 1 reply
   • 992 views
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   • mathematic
   • August 6, 2012

8. Terra forming Moons in our solar system

   By Kleeklor, March 12, 2013
   • 2 replies
   • 992 views
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   • pwagen
   • March 12, 2013

9. A New Area Law in General Relativity, questions.

   By beecee, July 26, 2019
   • 7 replies
   • 992 views
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   • Mordred
   • July 27, 2019

10. Does Digital TV make it easier for other intelligent lifeforms?

    By Kedas, March 20, 2006
    • 6 replies
    • 990 views
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    • Kedas
    • March 24, 2006

11. Was the first picosecond really a picosecond?

    By gib65, December 30, 2018
    • 3 replies
    • 990 views
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    • beecee
    • December 30, 2018

12. Alone again?

    By geordief, November 21, 2021
    • 8 replies
    • 990 views
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    • geordief
    • November 22, 2021

13. Practical Astronomy with your calculator

    By Ishtar, January 6, 2012
    • 1 reply
    • 989 views
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    • Tres Juicy
    • January 12, 2012

14. Recommend a textbook

    By Toby Jug, March 2, 2021
    • 5 replies
    • 989 views
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    • Toby Jug
    • March 2, 2021

15. formula for relationship between mass and time?

    By godofgamblers, December 30, 2014
    • 2 replies
    • 988 views
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    • godofgamblers
    • January 1, 2015

16. Galaxies are much bigger than we thought, study reveals

    By DanMP, September 11
    • 18 replies
    • 986 views
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    • Mordred
    • October 18

17. Studying Astronomy

    By Dan, December 20, 2006
    • 2 replies
    • 985 views
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    • Dan
    • December 20, 2006

18. liquid water in space

    By 36grit, December 27, 2011
    • 2 replies
    • 985 views
    • 
    • Airbrush
    • December 28, 2011

19. Gravity of a black hole (split from How large would a black hole need to be to overcome inflation and pull all matter one day into a big crunch?

    By Charles 3781, October 12, 2020
    • 9 replies
    • 985 views
    • 
    • Markus Hanke
    • October 15, 2020

20. How to find exoplanets from home

    By alfa015, April 20, 2017
    • 1 reply
    • 984 views
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    • Phi for All
    • April 20, 2017

21. Overview of Cosmology---clear brief online text

    By Martin, September 20, 2004
    • 0 replies
    • 983 views
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    • Martin
    • September 20, 2004

22. Size of universe

    By person, May 25, 2009
    • 1 reply
    • 983 views
    • 
    • Klaynos
    • May 25, 2009

23. Expansion of Lightwaves

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

24. How to find gravitational waves?

    By Гера�им, October 7, 2013
    • 2 replies
    • 982 views
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    • Airbrush
    • October 8, 2013

25. Time

    By us.2u, March 26, 2005
    • 4 replies
    • 981 views
    • 
    • Sayonara
    • March 27, 2005