Astronomy and Cosmology

3713 topics in this forum

1. What can we really learn about the effects of microgravity?

   By dimreepr, December 15, 2015
   • 5 replies
   • 1.3k views
   • 
   • swansont
   • December 16, 2015

2. Martian Plate Tectonics - or not

   By MigL, December 13, 2015
   • 5 replies
   • 1.4k views
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   • MigL
   • December 15, 2015

3. Holding pen for overly argumentative posts

   By Martin, December 9, 2010
   • 9 replies
   • 8.8k views
   • 
   • hypervalent_iodine
   • December 14, 2015

4. The Finite Universe 1 2

   By Airbrush, October 26, 2015
   • 31 replies
   • 4.4k views
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   • OConnor_LFC
   • December 14, 2015

5. What Effects Would Slowing Down the Moon Have on the Earth? - A Universe Sandbox Experiment.

   By CazzaBrank, December 11, 2015
   • 7 replies
   • 1.4k views
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   • Phi for All
   • December 11, 2015

6. Dark energy

   By Гера�им, November 11, 2015
   • 5 replies
   • 1.8k views
   • 
   • imatfaal
   • December 11, 2015

7. how to calculate the temperature of cmb over time ?

   By stephaneww, December 10, 2015
   • 2 replies
   • 1.7k views
   • 
   • stephaneww
   • December 10, 2015

8. cosmological constant, dark energy and Hubble radius

   By stephaneww, December 4, 2015
   • 1 reply
   • 1.2k views
   • 
   • stephaneww
   • December 7, 2015

9. What's the dealio with the heliosphere?

   By GrandMasterK, December 2, 2015
   • 4 replies
   • 1.5k views
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   • Ophiolite
   • December 3, 2015

10. Hard evidence for other universes?

    By Alexander1304, October 23, 2015
    • 21 replies
    • 4.3k views
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    • imatfaal
    • December 3, 2015

11. What elements, minerals, or just molecules do star forming ' MOLECULAR GAS CLOUDS' contain , as they start a Star Birth? 1 2

    By Mike Smith Cosmos, November 17, 2015
    • 42 replies
    • 5.8k views
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    • Mike Smith Cosmos
    • November 30, 2015

12. Roche Limit Query

    By GeeKay, November 10, 2015
    • 5 replies
    • 2.2k views
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    • imatfaal
    • November 18, 2015

13. One Way Trip to Mars

    By houshasei, November 7, 2015
    • 7 replies
    • 2k views
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    • Airbrush
    • November 14, 2015

14. Universe contracting 1 2

    By pastori, October 31, 2015
    • 49 replies
    • 5.5k views
    • 
    • michel123456
    • November 13, 2015

15. expanding universe conundrum

    By emil, November 12, 2015
    • 4 replies
    • 1.4k views
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    • Strange
    • November 13, 2015

16. A theory on the Universe expanding

    By Skins, November 10, 2015
    • 7 replies
    • 1.5k views
    • 
    • Skins
    • November 11, 2015

17. Dark Matter vs. Magnetism

    By ccwebb, October 14, 2015
    • 14 replies
    • 2.8k views
    • 
    • Phi for All
    • November 10, 2015

18. Unruh Radiation

    By Quetzalcoatl, November 4, 2015
    • 7 replies
    • 1.8k views
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    • Quetzalcoatl
    • November 10, 2015

19. Rate of expansion of the Universe

    By petrushka.googol, October 18, 2015
    • 2 replies
    • 1.2k views
    • 
    • Mordred
    • November 10, 2015

20. Planetary wobble

    By petrushka.googol, October 25, 2015
    • 3 replies
    • 1.2k views
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    • Ophiolite
    • November 2, 2015

21. No big bang?

    By Sorcerer, October 29, 2015
    • 11 replies
    • 1.8k views
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    • Sorcerer
    • October 31, 2015

22. Origins of the Universe 1 2

    By John316, October 16, 2015
    • 35 replies
    • 4.5k views
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    • neutrinosalad
    • October 31, 2015

23. The First Photon

    By petrushka.googol, October 30, 2015
    • 3 replies
    • 1.2k views
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    • pavelcherepan
    • October 31, 2015

24. determining semiminor axis in elliptic orbit

    By h4tt3n, March 2, 2006
    • 17 replies
    • 8.3k views
    • 
    • Smashinbedrock
    • October 28, 2015

25. How to give a spacecraft a translation motion at constant mass.

    By Maximillian, October 27, 2015
    • 4 replies
    • 1.2k views
    • 
    • Strange
    • October 27, 2015