Astronomy and Cosmology

3708 topics in this forum

1. Description of a photon

   By John0117, May 6, 2014
   • 11 replies
   • 2.3k views
   • 
   • Enthalpy
   • May 11, 2014

2. Escape velocity how can u count?

   By ramanan, December 19, 2003
   • 7 replies
   • 2.3k views
   • 
   • Radical Edward
   • January 5, 2004

3. How do they know it?

   By Airbrush, February 2, 2012
   • 14 replies
   • 2.3k views
   • 
   • imatfaal
   • February 7, 2012

4. New big bang idea

   By Duke, August 20, 2004
   • 13 replies
   • 2.3k views
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   • Nevermore
   • September 16, 2004

5. Fermi Paradox?

   By ydoaPs, June 23, 2014
   • 17 replies
   • 2.3k views
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   • Spyman
   • July 2, 2014

6. How Are Planetary Orbits Self-Correcting, or Self-Regulating?

   By Seeking Science, March 27, 2013
   • 10 replies
   • 2.3k views
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   • Enthalpy
   • April 3, 2013

7. Oscillating View of Infinity

   By AbnormallyHonest, March 25, 2017
   • 19 replies
   • 2.3k views
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   • Mordred
   • April 23, 2017

8. A different look at the big bang.

   By aman, July 14, 2002
   • 12 replies
   • 2.3k views
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   • alt_f13
   • August 19, 2003

9. The center of the universe

   By tskaze, April 19, 2005
   • 18 replies
   • 2.3k views
   • 
   • Spyman
   • July 19, 2005

10. singularities and blackholes

    By Money, August 5, 2007
    • 15 replies
    • 2.3k views
    • 
    • Money
    • September 8, 2007

11. Asteroid mining

    By lemur, April 27, 2011
    • 11 replies
    • 2.3k views
    • 
    • Moontanman
    • April 28, 2011

12. Black Holes and White Holes

    By WinstonSmith, May 20, 2008
    • 17 replies
    • 2.3k views
    • 
    • Klaynos
    • June 2, 2008

13. Accelerating Expansion of the Universe?

    By Cosmo_Ken, September 1, 2017
    • 14 replies
    • 2.3k views
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    • Mordred
    • September 8, 2017

14. The Location of Celestial Objects

    By Slinkey, March 12, 2008
    • 23 replies
    • 2.3k views
    • 
    • Klaynos
    • March 20, 2008

15. Deuterium star?

    By Moontanman, February 7, 2018
    • 5 replies
    • 2.3k views
    • 
    • dimreepr
    • February 7, 2018

16. space and time created at the Big Bang

    By gib65, January 4, 2006
    • 18 replies
    • 2.3k views
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    • Stringtheory
    • January 8, 2006

17. Siamese Planet?

    By DrmDoc, February 5, 2016
    • 16 replies
    • 2.3k views
    • 
    • DrmDoc
    • February 6, 2016

18. Manipulative ideas for Solar system

    By diggerdoo, October 28, 2007
    • 3 replies
    • 2.2k views
    • 
    • iNow
    • October 31, 2007

19. The science of Parallel universes

    By h_parikhh, April 29, 2015
    • 9 replies
    • 2.2k views
    • 
    • jeffellis
    • October 14, 2015

20. The elliptical path of the sun

    By ChrisW, July 31, 2010
    • 2 replies
    • 2.2k views
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    • Janus
    • July 31, 2010

21. How do we know the universe isn't a loop?

    By SamBridge, January 30, 2013
    • 20 replies
    • 2.2k views
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    • SamBridge
    • February 5, 2013

22. If the universe is spatially finite and flat, could you fly 'out of space'?

    By Fanghur, July 28, 2013
    • 4 replies
    • 2.2k views
    • 
    • Bill Angel
    • August 7, 2013

23. Nuclear Star Trek

    By Gian, June 29, 2020
    • 14 replies
    • 2.2k views
    • 
    • swansont
    • August 1, 2020

24. Our perspective of the Sun

    By Adamchiv, January 25, 2021
    • 24 replies
    • 2.2k views
    • 
    • iNow
    • January 26, 2021

25. limits of edge of universe

    By qwerty, May 3, 2005
    • 17 replies
    • 2.2k views
    • 
    • nomadd22
    • May 12, 2005