Astronomy and Cosmology

3708 topics in this forum

1. A year in a day

   By [Tycho?], October 5, 2006
   • 2 replies
   • 1.1k views
   • 
   • Martin
   • October 5, 2006

2. A new theory on the origin of the universe

   By NLN, November 2, 2007
   • 2 replies
   • 1.1k views
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   • DrDNA
   • November 3, 2007

3. Expansion

   By umjd, July 26, 2012
   • 3 replies
   • 1.1k views
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   • imatfaal
   • July 26, 2012

4. Is space infinite or finite?

   By Gater, September 10, 2019
   • 1 reply
   • 1.1k views
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   • Strange
   • September 10, 2019

5. New cosmocalculator

   By Mordred, July 11, 2020
   • 1 reply
   • 1.1k views
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   • joigus
   • July 15, 2020

6. New Horizons Pluto encounter

   By Mad For Science, February 14, 2015
   • 0 replies
   • 1.1k views
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   • Mad For Science
   • February 14, 2015

7. No Craters Found on Pluto, Yet

   By Airbrush, July 20, 2015
   • 2 replies
   • 1.1k views
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   • Enthalpy
   • August 3, 2015

8. Q about black holes (split from Black Hole Energy Distribution)

   By Airbrush, January 31, 2019
   • 15 replies
   • 1.1k views
   • 
   • Mordred
   • February 2, 2019

9. The expanding universe

   By geordief, March 18, 2021
   • 6 replies
   • 1.1k views
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   • MigL
   • March 19, 2021

10. reflecting telescope

    By psi20, August 4, 2004
    • 2 replies
    • 1.1k views
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    • admiral_ju00
    • August 4, 2004

11. Nuetron-stars

    By Anura, June 8, 2010
    • 3 replies
    • 1.1k views
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    • Airbrush
    • June 9, 2010

12. Death by entropy?

    By NikNak, July 20, 2012
    • 2 replies
    • 1.1k views
    • 
    • JohnStu
    • September 14, 2012

13. What happens to the energy emitted by the Sun?

    By ravell, April 30, 2017
    • 3 replies
    • 1.1k views
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    • EdEarl
    • April 30, 2017

14. Difference between gas composition of nebulae and gas planets like jupiter

    By Layers, October 6, 2018
    • 5 replies
    • 1.1k views
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    • beecee
    • October 7, 2018

15. Venus questions (split from Venus cooled off?)

    By Prometheus, May 23, 2019
    • 2 replies
    • 1.1k views
    • 
    • dimreepr
    • May 23, 2019

16. 20 greastest/most important develpments in space

    By Guest nasza, March 14, 2005
    • 4 replies
    • 1.1k views
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    • ed84c
    • March 14, 2005

17. Sun's Life-cycle Questions

    By Z07, September 3, 2013
    • 1 reply
    • 1.1k views
    • 
    • mathematic
    • September 3, 2013

18. Corrections to the Cosmic Microwave Map (can anyone clarify?)

    By Martin, August 24, 2005
    • 1 reply
    • 1.1k views
    • 
    • Severian
    • August 24, 2005

19. Help Needed Over Stellar Magnitude Issue

    By GeeKay, December 10, 2018
    • 2 replies
    • 1.1k views
    • 
    • GeeKay
    • December 11, 2018

20. A new supernova in Messier 95

    By ACG52, March 23, 2012
    • 0 replies
    • 1.1k views
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    • ACG52
    • March 23, 2012

21. Gravitational waves in space time continuum

    By petrushka.googol, October 6, 2013
    • 2 replies
    • 1.1k views
    • 
    • BusaDave9
    • October 6, 2013

22. Negative dimension / antispace

    By Mr Antykox, November 18, 2020
    • 6 replies
    • 1.1k views
    • 
    • Airbrush
    • December 3, 2020

23. what a Tool!

    By YT2095, November 26, 2008
    • 2 replies
    • 1.1k views
    • 
    • ajb
    • November 26, 2008

24. condensed dust seeds planet formation ?

    By Widdekind, April 14, 2011
    • 0 replies
    • 1.1k views
    • 
    • Widdekind
    • April 14, 2011

25. Expansion of spacetime: Great Break?

    By Coyote, January 17, 2013
    • 3 replies
    • 1.1k views
    • 
    • ACG52
    • January 18, 2013