Astronomy and Cosmology

3708 topics in this forum

1. Stephen Hawking, ill...

   By jackson33, April 20, 2009
   • 3 replies
   • 1.2k views
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   • Megabrain
   • April 20, 2009

2. Drake Equation

   By paulsutton, June 18, 2020
   • 3 replies
   • 1.2k views
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   • Mordred
   • June 19, 2020

3. Gravitational waves embossed on Europa?

   By robert1978bp, November 23, 2020
   • 11 replies
   • 1.2k views
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   • Janus
   • November 24, 2020

4. Steady State Universe

   By Guest, January 1, 1970
   • 0 replies
   • 1.2k views
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   • Guest
   • January 1, 1970

5. Dark Matter

   By David Levy, June 5, 2012
   • 2 replies
   • 1.2k views
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   • Spyman
   • June 14, 2012

6. Lightning

   By petrushka.googol, August 24, 2015
   • 4 replies
   • 1.2k views
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   • Endy0816
   • August 25, 2015

7. "Star Destroyer" beams possible ?

   By Widdekind, January 3, 2012
   • 1 reply
   • 1.2k views
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   • mathematic
   • January 4, 2012

8. Curvature of universe

   By NaxAlpha, January 12, 2013
   • 3 replies
   • 1.2k views
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   • elfmotat
   • January 12, 2013

9. The Truth About Geometric Unity

   By sevensixtwo, August 18, 2013
   • 1 reply
   • 1.2k views
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   • imatfaal
   • August 19, 2013

10. The affect of space weather

    By bear33, January 19, 2021
    • 7 replies
    • 1.2k views
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    • cannongray
    • January 27, 2021

11. Hill sphere shape

    By Zura, April 20, 2021
    • 7 replies
    • 1.2k views
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    • Zura
    • April 20, 2021

12. If some dark matter was also it's own antimatter?

    By Sorcerer, September 4, 2015
    • 5 replies
    • 1.2k views
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    • swansont
    • September 9, 2015

13. Badder than hubble.

    By alt_f13, December 23, 2004
    • 3 replies
    • 1.1k views
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    • alt_f13
    • December 25, 2004

14. The First Photon

    By petrushka.googol, October 30, 2015
    • 3 replies
    • 1.1k views
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    • pavelcherepan
    • October 31, 2015

15. Laser-Driven Tidal Wave to Understand What Happens to Information Inside a Blackhole. Opinions? Thoughts?

    By Wil242424, February 6, 2017
    • 3 replies
    • 1.1k views
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    • MigL
    • February 13, 2017

16. Lake on Titan as big as Lake Ontario

    By Martin, July 31, 2008
    • 5 replies
    • 1.1k views
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    • Moontanman
    • November 7, 2008

17. The rotation curve problem

    By Muser, October 26, 2016
    • 1 reply
    • 1.1k views
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    • swansont
    • October 26, 2016

18. Black hole mergers (split from LIGO/VIRGO)

    By geordief, October 17, 2017
    • 12 replies
    • 1.1k views
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    • Strange
    • October 17, 2017

19. A moon coverall to simulate Earth gravity on the Moon

    By harlock, March 8, 2019
    • 8 replies
    • 1.1k views
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    • Carrock
    • March 13, 2019

20. More Questions About Hawking Radiation

    By Airbrush, April 7, 2020
    • 3 replies
    • 1.1k views
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    • MigL
    • April 7, 2020

21. Planetary Migration:

    By beecee, May 10, 2019
    • 10 replies
    • 1.1k views
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    • Moontanman
    • May 12, 2019

22. NASA Mars probe discovery.

    By Auk, December 15, 2004
    • 3 replies
    • 1.1k views
    • 
    • Auk
    • December 15, 2004

23. estimating galaxy ages from PNe ?

    By Widdekind, January 13, 2012
    • 1 reply
    • 1.1k views
    • 
    • pantheory
    • January 17, 2012

24. How strong are pulsar winds?

    By SilentSky23, October 29, 2019
    • 5 replies
    • 1.1k views
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    • swansont
    • October 29, 2019

25. Universe finite more likely now

    By Martin, February 12, 2005
    • 2 replies
    • 1.1k views
    • 
    • Martin
    • February 13, 2005