Astronomy and Cosmology

3705 topics in this forum

1. Gravitation constant G can vary 0.1% in 6 years 1 2

   By acsinuk, August 18, 2015
   • 47 replies
   • 4.6k views
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   • Strange
   • September 10, 2015

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

   By Sorcerer, September 4, 2015
   • 5 replies
   • 1.1k views
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   • swansont
   • September 9, 2015

3. dark energy, Unruh effect , Hawking radiation

   By stephaneww, September 9, 2015
   • 1 reply
   • 947 views
   • 
   • swansont
   • September 9, 2015

4. Is Our Existence Abnormally Early?

   By yaddlezap818, September 2, 2015
   • 2 replies
   • 1.3k views
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   • yaddlezap818
   • September 5, 2015

5. Neutron stars and black holes

   By petrushka.googol, July 19, 2015
   • 9 replies
   • 1.5k views
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   • imatfaal
   • August 28, 2015

6. Lightning

   By petrushka.googol, August 24, 2015
   • 4 replies
   • 1.1k views
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   • Endy0816
   • August 25, 2015

7. Water & Hydroxide Masers

   By Ant Sinclair, August 20, 2015
   • 19 replies
   • 1.9k views
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   • Ant Sinclair
   • August 21, 2015

8. Space vacuum magnetic energy

   By acsinuk, July 21, 2015
   • 6 replies
   • 1.2k views
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   • acsinuk
   • August 19, 2015

9. Earth Gravity

   By AmirShahzad.PK, July 29, 2015
   • 8 replies
   • 1.7k views
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   • Acme
   • August 17, 2015

10. New direction in physics and astrophysics

    By Vano87, August 16, 2015
    • 1 reply
    • 926 views
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    • swansont
    • August 16, 2015

11. Astronomy word game. 1 2 3 4 10

    By Mad For Science, July 17, 2015
    • 246 replies
    • 18.1k views
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    • ACG52
    • August 7, 2015

12. No Craters Found on Pluto, Yet

    By Airbrush, July 20, 2015
    • 2 replies
    • 1.1k views
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    • Enthalpy
    • August 3, 2015

13. Time Dilation (can u answer this)

    By XxWarsongxX, July 29, 2015
    • 4 replies
    • 874 views
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    • Mordred
    • July 30, 2015

14. Getting darker early in Tenerife thanin England

    By ohdearme, July 25, 2015
    • 3 replies
    • 3k views
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    • ohdearme
    • July 27, 2015

15. Astronomical seeing

    By kos, July 26, 2015
    • 0 replies
    • 757 views
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    • kos
    • July 26, 2015

16. Would the presence of Oxygen in the atmosphere of a planet indicate life?

    By Robittybob1, July 19, 2015
    • 8 replies
    • 1.7k views
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    • Robittybob1
    • July 23, 2015

17. Adaptive optics (optical telescopes)

    By Danijel Gorupec, June 4, 2015
    • 14 replies
    • 1.7k views
    • 
    • Enthalpy
    • July 17, 2015

18. Magnetic field on earth?

    By Rafiqul Islam, May 29, 2015
    • 5 replies
    • 1.5k views
    • 
    • Enthalpy
    • July 17, 2015

19. What decides longitude zero ?

    By Externet, July 14, 2015
    • 6 replies
    • 1.3k views
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    • MonDie
    • July 17, 2015

20. Swimming on the surface of Titan

    By Gian, October 28, 2014
    • 14 replies
    • 3.1k views
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    • Gian
    • July 16, 2015

21. I need a mentor

    By sci.phys.love, July 12, 2015
    • 2 replies
    • 1.3k views
    • 
    • ajb
    • July 12, 2015

22. Mysterious spots on Pluto.

    By Mad For Science, July 2, 2015
    • 1 reply
    • 1.1k views
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    • pavelcherepan
    • July 8, 2015

23. Harnessing Solar Power in Space

    By GeeKay, May 18, 2015
    • 13 replies
    • 2.7k views
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    • swansont
    • July 5, 2015

24. Cosmic Microwave Background and Black Holes

    By mathematic, June 21, 2015
    • 6 replies
    • 1.9k views
    • 
    • MigL
    • June 29, 2015

25. Telescope to see a person on another planet

    By kos, June 27, 2015
    • 16 replies
    • 2.4k views
    • 
    • LaurieAG
    • June 29, 2015