Astronomy and Cosmology

3713 topics in this forum

1. Hypervelocity stars, new mechanisms of creation

   By Sensei, August 20, 2015
   • 1 reply
   • 1.1k views
   • 
   • Enthalpy
   • September 29, 2015

2. 'Instability Strip' from fusion PP-to-CNO transition ?

   By Widdekind, August 6, 2011
   • 6 replies
   • 4.1k views
   • 
   • Enthalpy
   • September 29, 2015

3. 67P as an apple core

   By Enthalpy, February 17, 2015
   • 2 replies
   • 1.5k views
   • 
   • Enthalpy
   • September 29, 2015

4. Solar Neighborhood Enigma 1 2

   By David Levy, September 22, 2015
   • 37 replies
   • 3.6k views
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   • swansont
   • September 25, 2015

5. Aging of neutrinos

   By petrushka.googol, September 20, 2015
   • 8 replies
   • 1.7k views
   • 
   • Mordred
   • September 24, 2015

6. Explanation of Dimentions

   By Rahman, September 21, 2015
   • 3 replies
   • 1k views
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   • Strange
   • September 23, 2015

7. Hawking search for ET? How successful do you think it will be? 1 2

   By Robittybob1, July 21, 2015
   • 38 replies
   • 4.1k views
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   • Moontanman
   • September 22, 2015

8. Isn't the 'something from nothing' notion wrong?

   By Herms, September 15, 2015
   • 6 replies
   • 2.1k views
   • 
   • puppypower
   • September 20, 2015

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

   By acsinuk, August 18, 2015
   • 47 replies
   • 5.2k views
   • 
   • Strange
   • September 10, 2015

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

    By Sorcerer, September 4, 2015
    • 5 replies
    • 1.2k views
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    • swansont
    • September 9, 2015

11. dark energy, Unruh effect , Hawking radiation

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

12. Is Our Existence Abnormally Early?

    By yaddlezap818, September 2, 2015
    • 2 replies
    • 1.4k views
    • 
    • yaddlezap818
    • September 5, 2015

13. Neutron stars and black holes

    By petrushka.googol, July 19, 2015
    • 9 replies
    • 1.6k views
    • 
    • imatfaal
    • August 28, 2015

14. Lightning

    By petrushka.googol, August 24, 2015
    • 4 replies
    • 1.2k views
    • 
    • Endy0816
    • August 25, 2015

15. Water & Hydroxide Masers

    By Ant Sinclair, August 20, 2015
    • 19 replies
    • 2.1k views
    • 
    • Ant Sinclair
    • August 21, 2015

16. Space vacuum magnetic energy

    By acsinuk, July 21, 2015
    • 6 replies
    • 1.3k views
    • 
    • acsinuk
    • August 19, 2015

17. Earth Gravity

    By AmirShahzad.PK, July 29, 2015
    • 8 replies
    • 1.9k views
    • 
    • Acme
    • August 17, 2015

18. New direction in physics and astrophysics

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

19. Astronomy word game. 1 2 3 4 10

    By Mad For Science, July 17, 2015
    • 246 replies
    • 20.6k views
    • 
    • ACG52
    • August 7, 2015

20. No Craters Found on Pluto, Yet

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

21. Time Dilation (can u answer this)

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

22. Getting darker early in Tenerife thanin England

    By ohdearme, July 25, 2015
    • 3 replies
    • 3.3k views
    • 
    • ohdearme
    • July 27, 2015

23. Astronomical seeing

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

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

    By Robittybob1, July 19, 2015
    • 8 replies
    • 1.8k views
    • 
    • Robittybob1
    • July 23, 2015

25. Adaptive optics (optical telescopes)

    By Danijel Gorupec, June 4, 2015
    • 14 replies
    • 1.9k views
    • 
    • Enthalpy
    • July 17, 2015