Astronomy and Cosmology

3708 topics in this forum

1. Apep

   By Bmpbmp1975, February 16, 2020
   • 20 replies
   • 1.8k views
   • 
   • Bmpbmp1975
   • February 16, 2020

2. Hot Jupiters.

   By Gareth56, January 16, 2009
   • 11 replies
   • 1.8k views
   • 
   • NowThatWeKnow
   • January 25, 2009

3. How can I see early light from the big bang? Have I travelled faster than it?

   By psjmartin, April 3, 2013
   • 9 replies
   • 1.8k views
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   • Iggy
   • May 1, 2013

4. Why don't we make our calendar more rational and simple?

   By Myuncle, April 12, 2014
   • 17 replies
   • 1.8k views
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   • Phi for All
   • April 15, 2014

5. 3D Space Simulator

   By C60, May 4, 2005
   • 5 replies
   • 1.8k views
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   • Dave
   • May 25, 2005

6. How to power a fusion engine?

   By Daymare17, September 12, 2005
   • 10 replies
   • 1.8k views
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   • [Tycho?]
   • September 15, 2005

7. So there is no need for bigbang-theory?

   By Hello2, September 11, 2020
   • 8 replies
   • 1.8k views
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   • beecee
   • April 17, 2022

8. Gravitational propagation and the mass media

   By fafalone, January 22, 2003
   • 7 replies
   • 1.8k views
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   • Glider
   • February 25, 2003

9. Moon Orbit

   By Primarygun, July 20, 2007
   • 3 replies
   • 1.8k views
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   • Primarygun
   • July 21, 2007

10. Everywhere the same red-shift, possible?

    By alpha2cen, March 5, 2011
    • 5 replies
    • 1.8k views
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    • J.C.MacSwell
    • March 19, 2011

11. Friedmann Equations connection to Einstein’s GR Field Equations...explain

    By storyteller, July 11, 2021
    • 8 replies
    • 1.8k views
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    • studiot
    • July 12, 2021

12. any good science experiments...

    By Halash, September 11, 2004
    • 11 replies
    • 1.8k views
    • 
    • RICHARDBATTY
    • September 14, 2004

13. LRO Image question

    By mooeypoo, November 19, 2011
    • 13 replies
    • 1.8k views
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    • Appolinaria
    • November 20, 2011

14. The Earth behind the Moon

    By michel123456, July 28, 2016
    • 14 replies
    • 1.8k views
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    • Janus
    • July 31, 2016

15. Beyond universe

    By copperstream, February 21, 2008
    • 1 reply
    • 1.8k views
    • 
    • swansont
    • February 21, 2008

16. Why are quasars point sources?

    By Airbrush, February 16, 2009
    • 8 replies
    • 1.8k views
    • 
    • Airbrush
    • March 8, 2009

17. I need a 3D map of the universe out to 400 ly...suggestions?

    By rrw4rusty, October 31, 2016
    • 4 replies
    • 1.8k views
    • 
    • Sensei
    • November 3, 2016

18. Dummies Advocate

    By AO2012, April 19, 2009
    • 15 replies
    • 1.8k views
    • 
    • GDG
    • April 29, 2009

19. Space - Can Private Industry actually compete with China?

    By DeepSeaBase, May 11, 2021
    • 14 replies
    • 1.8k views
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    • SpaceJac111
    • May 21, 2021

20. Sunshine on Titan 1 2

    By Gian, March 22
    • 27 replies
    • 1.8k views
    • 
    • swansont
    • April 14

21. The expanding universe; chicken or egg?

    By pioneer, September 17, 2010
    • 0 replies
    • 1.8k views
    • 
    • pioneer
    • September 17, 2010

22. Vacumm and Sound

    By Guest Suzz, March 6, 2004
    • 8 replies
    • 1.8k views
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    • Fluent in Lies
    • March 29, 2004

23. How did the rotation of galaxies?

    By Гера�им, January 15, 2015
    • 6 replies
    • 1.8k views
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    • jeffellis
    • October 14, 2015

24. The universe is flat? (split from Time for a different view)

    By MPMin, May 18, 2021
    • 19 replies
    • 1.8k views
    • 
    • studiot
    • May 20, 2021

25. Dark Matter and Galaxy size

    By J.C.MacSwell, June 29, 2013
    • 9 replies
    • 1.8k views
    • 
    • Archimedes
    • July 4, 2013