Astronomy and Cosmology

3712 topics in this forum

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

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

2. Non-spiral galaxies collision

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

3. Light 360?

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

4. Interstellar, the Movie

   By Airbrush, November 16, 2014
   • 8 replies
   • 2.1k views
   • 
   • GeeKay
   • January 10, 2015

5. Lunar Inclination, why does it vary ?

   By Bjarne, January 10, 2015
   • 6 replies
   • 1.6k views
   • 
   • Bjarne
   • January 10, 2015

6. A Milky Quasar?

   By GeeKay, January 6, 2015
   • 7 replies
   • 1.6k views
   • 
   • Airbrush
   • January 10, 2015

7. Lunar Inclination anomaly - Is it true ?

   By Bjarne, January 3, 2015
   • 3 replies
   • 1.9k views
   • 
   • Bjarne
   • January 8, 2015

8. How does limb Darkening affect the radius calculated?

   By physica, January 6, 2015
   • 3 replies
   • 2.6k views
   • 
   • imatfaal
   • January 7, 2015

9. Feedback desired on an expansion respresentation

   By Endy0816, January 5, 2015
   • 4 replies
   • 1.2k views
   • 
   • Endy0816
   • January 5, 2015

10. Energy Equations !

    By Commander, January 2, 2015
    • 16 replies
    • 2.2k views
    • 
    • Strange
    • January 2, 2015

11. why most of space videos & images are CGI?

    By Ganesh Ujwal, December 30, 2014
    • 14 replies
    • 4.6k views
    • 
    • MigL
    • January 2, 2015

12. formula for relationship between mass and time?

    By godofgamblers, December 30, 2014
    • 2 replies
    • 1k views
    • 
    • godofgamblers
    • January 1, 2015

13. some questions from non-science guy

    By godofgamblers, December 24, 2014
    • 19 replies
    • 2.2k views
    • 
    • godofgamblers
    • December 29, 2014

14. looking at the solar system

    By michel123456, March 2, 2013
    • 11 replies
    • 3.3k views
    • 
    • StringJunky
    • December 28, 2014

15. How is the Horizon Problem really a problem?

    By Ganesh Ujwal, December 23, 2014
    • 5 replies
    • 2k views
    • 
    • Mordred
    • December 28, 2014

16. Why is the day sky blue?

    By dstebbins, December 21, 2014
    • 8 replies
    • 2k views
    • 
    • Eise
    • December 23, 2014

17. Cosmic rays and neutrinos

    By Ganesh Ujwal, December 22, 2014
    • 3 replies
    • 1.1k views
    • 
    • Mordred
    • December 22, 2014

18. Two Halves that don't make a whole

    By LaurieAG, December 18, 2014
    • 3 replies
    • 1.6k views
    • 
    • LaurieAG
    • December 22, 2014

19. Suppose that I am looking in my telescope to a distant star 1 2 3 4 6

    By michel123456, November 22, 2014
    • 140 replies
    • 15.4k views
    • 
    • Ophiolite
    • December 20, 2014

20. Basic Holographic Principle question

    By incompetence, December 18, 2014
    • 3 replies
    • 1.1k views
    • 
    • Endy0816
    • December 20, 2014

21. The CMB, how is that possible? 1 2

    By michel123456, November 1, 2014
    • 45 replies
    • 6.2k views
    • 
    • imatfaal
    • December 17, 2014

22. Multiverses, wow that's big!

    By mpmcd101, November 30, 2014
    • 1 reply
    • 1.1k views
    • 
    • hypervalent_iodine
    • November 30, 2014

23. What direction is the big bang? (split from telescope looking at a distant star)

    By nullus, November 23, 2014
    • 12 replies
    • 1.9k views
    • 
    • swansont
    • November 27, 2014

24. Astrophotography Contest

    By Eve, November 26, 2014
    • 0 replies
    • 1k views
    • 
    • Eve
    • November 26, 2014

25. Evaporation of a black hole

    By afm, November 14, 2014
    • 2 replies
    • 1.2k views
    • 
    • MigL
    • November 14, 2014