Astronomy and Cosmology

3710 topics in this forum

1. The speed of the expansion of the universe at the beginning?

   By noctua, January 13, 2015
   • 8 replies
   • 1.6k views
   • 
   • Spyman
   • March 11, 2015

2. Black Holes

   By Kelnad, February 26, 2015
   • 7 replies
   • 1.8k views
   • 
   • pzkpfw
   • March 11, 2015

3. Earth Acceleration by New Moon

   By Bjarne, March 6, 2015
   • 4 replies
   • 1.3k views
   • 
   • Robittybob1
   • March 7, 2015

4. perihelion & lowest light-time don't coincide

   By MonDie, January 4, 2015
   • 7 replies
   • 2.1k views
   • 
   • MonDie
   • March 2, 2015

5. The ever changing Sun's magnetic field. 1 2

   By Robittybob1, February 10, 2015
   • 41 replies
   • 3.9k views
   • 
   • Robittybob1
   • February 27, 2015

6. Is our sun part of a binary system?

   By LooSea, February 25, 2015
   • 12 replies
   • 2.9k views
   • 
   • Airbrush
   • February 27, 2015

7. Does Dark Matter imply Dark Gravity?

   By mothythewso, January 12, 2015
   • 14 replies
   • 1.9k views
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   • Strange
   • February 24, 2015

8. Higgs field and black matter

   By Edgard Neuman, February 12, 2015
   • 17 replies
   • 2k views
   • 
   • Edgard Neuman
   • February 23, 2015

9. Terraforming Titan

   By Hans de Vries, February 21, 2015
   • 3 replies
   • 1.5k views
   • 
   • Afraid of Time
   • February 23, 2015

10. How does the Sun get orbital energy to start orbiting a barycenter? 1 2 3 4 7

    By Robittybob1, February 7, 2015
    • 156 replies
    • 14.8k views
    • 
    • Robittybob1
    • February 19, 2015

11. Pluto-Charon combination. How two astronomical bodies orbit barycenter

    By Robittybob1, February 15, 2015
    • 15 replies
    • 2.6k views
    • 
    • Robittybob1
    • February 17, 2015

12. New Horizons Pluto encounter

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

13. I know I want to go to school for Astronomy or possibly Cosmology, but

    By D4N31L, February 10, 2015
    • 1 reply
    • 1k views
    • 
    • ajb
    • February 12, 2015

14. History of "Barycenter"

    By whiskers, February 10, 2015
    • 2 replies
    • 1.1k views
    • 
    • whiskers
    • February 10, 2015

15. Astronomy Homework Questions! Help!

    By Joshua Simons, February 10, 2015
    • 1 reply
    • 1.6k views
    • 
    • AidanThomas
    • February 10, 2015

16. Riding Light video

    By Strange, February 6, 2015
    • 3 replies
    • 1.7k views
    • 
    • Mordred
    • February 6, 2015

17. Planck 2015 data released

    By Mordred, February 6, 2015
    • 0 replies
    • 831 views
    • 
    • Mordred
    • February 6, 2015

18. Planet between Mars and Jupiter

    By Moontanman, January 30, 2015
    • 19 replies
    • 2.8k views
    • 
    • Robittybob1
    • February 6, 2015

19. Moon North

    By michel123456, January 30, 2015
    • 7 replies
    • 1.4k views
    • 
    • Mordred
    • February 4, 2015

20. Questions Concerning The Planck Epoch

    By thebigdog, January 19, 2015
    • 5 replies
    • 1.4k views
    • 
    • imatfaal
    • January 21, 2015

21. Can a redshift arise from expanding space? 1 2 3

    By Rolando, January 14, 2015
    • 53 replies
    • 6.4k views
    • 
    • Mordred
    • January 20, 2015

22. How close is too close?

    By TransformerRobot, December 14, 2014
    • 19 replies
    • 2.5k views
    • 
    • mothythewso
    • January 19, 2015

23. Some Personal Reflections: After Watching the Film-Drama "Hawking"(2004)

    By RonPrice, January 19, 2015
    • 2 replies
    • 1.5k views
    • 
    • RonPrice
    • January 19, 2015

24. Non-spiral galaxies collision

    By MarkE, January 13, 2015
    • 10 replies
    • 2.6k views
    • 
    • MarkE
    • January 16, 2015

25. Light 360?

    By Endy0816, January 14, 2015
    • 2 replies
    • 970 views
    • 
    • Endy0816
    • January 14, 2015