Astronomy and Cosmology

3705 topics in this forum

1. standard star formation model???

   By paragaster, March 13, 2017
   • 1 reply
   • 1.1k views
   • 
   • swansont
   • March 13, 2017

2. exact value of vaccum catastroph ? 1 2

   By stephaneww, April 26, 2016
   • 27 replies
   • 3.7k views
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   • stephaneww
   • March 12, 2017

3. When Did US Astronauts Rescue Russian Cosmonauts?

   By PS85, November 12, 2014
   • 6 replies
   • 2.5k views
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   • Carrock
   • March 10, 2017

4. Eternal Inflation.

   By Bill S, March 5, 2017
   • 6 replies
   • 1.3k views
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   • Bill S
   • March 10, 2017

5. Why a colony on Mars, rather than on the Moon?

   By Cosmo_Ken, January 20, 2017
   • 16 replies
   • 2.6k views
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   • harlock
   • March 10, 2017

6. Meteors or "shooting stars" - meteoroid - mateorite

   By Abdelmoghit, February 21, 2017
   • 6 replies
   • 1.3k views
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   • Ahmedsen
   • March 9, 2017

7. Questions About Comets (formerly Can Someone explain.....)

   By pretender, May 5, 2006
   • 20 replies
   • 3.4k views
   • 
   • Ahmedsen
   • March 9, 2017

8. How often are black holes born?

   By Airbrush, March 7, 2017
   • 12 replies
   • 1.4k views
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   • Airbrush
   • March 8, 2017

9. There can only be one, but I made 2 versions of my Theory of Everything.

   By Kevin William Belisle, March 8, 2017
   • 1 reply
   • 849 views
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   • swansont
   • March 8, 2017

10. How long does it take for Earth to orbit Moon as seen from Moon's perspective?

    By Nicholas Kang, March 8, 2017
    • 3 replies
    • 1.4k views
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    • Argent
    • March 8, 2017

11. Is Recession Rate Impacted by Leaving Gravity Wells

    By zapatos, March 2, 2017
    • 17 replies
    • 1.3k views
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    • zapatos
    • March 3, 2017

12. The Sun's Gravity Well

    By AceEducator, March 2, 2017
    • 1 reply
    • 1.3k views
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    • swansont
    • March 2, 2017

13. universe as a system

    By paragaster, February 27, 2017
    • 4 replies
    • 1.2k views
    • 
    • mathematic
    • March 2, 2017

14. How did Newton and others do it?

    By Cosmo_Ken, January 23, 2017
    • 7 replies
    • 1.9k views
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    • Sensei
    • February 20, 2017

15. Is Cosmic Ray Detection Really That Promising in the Field of Dark Matter Study?

    By QuantumPerihelion, February 15, 2017
    • 2 replies
    • 760 views
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    • Bender
    • February 16, 2017

16. How does the Moon affect us?

    By AxoNbaNd, January 29, 2017
    • 11 replies
    • 1.9k views
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    • Argent
    • February 16, 2017

17. what are some facts supporting the Big Rip?

    By youroriginal, February 13, 2017
    • 3 replies
    • 1.1k views
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    • imatfaal
    • February 14, 2017

18. Telescope Mirror- thickness

    By Wil242424, February 10, 2017
    • 5 replies
    • 1.6k views
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    • Bender
    • February 14, 2017

19. 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
    • 
    • MigL
    • February 13, 2017

20. Boundary condition at the Big Bang

    By Bill S, February 8, 2017
    • 2 replies
    • 1.1k views
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    • Bill S
    • February 8, 2017

21. List of galaxies by size?

    By Daecon, February 5, 2017
    • 3 replies
    • 1.2k views
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    • Outrider
    • February 6, 2017

22. History of Astronomy?

    By Cosmo_Ken, January 11, 2017
    • 6 replies
    • 1.4k views
    • 
    • swansont
    • February 5, 2017

23. Dipole Repeller. Wait,what?

    By Outrider, January 30, 2017
    • 21 replies
    • 4.5k views
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    • Mordred
    • February 3, 2017

24. Are all comprised of waves?

    By Quantum321, January 6, 2017
    • 21 replies
    • 2.4k views
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    • swansont
    • February 1, 2017

25. Exoplanet moons. Are they being detected?

    By Outrider, January 28, 2017
    • 2 replies
    • 922 views
    • 
    • Outrider
    • January 28, 2017