Astronomy and Cosmology

3692 topics in this forum

1. History of "Barycenter"

   By whiskers, February 10, 2015
   • 2 replies
   • 1k views
   • 
   • whiskers
   • February 10, 2015

2. How does Dark Energy affect Dark Matter

   By Chalkman, March 21, 2015
   • 2 replies
   • 1.2k views
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   • Mordred
   • March 26, 2015

3. Electrodynamic Tethers as Generators

   By IResnick, April 6, 2015
   • 2 replies
   • 1.2k views
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   • Moonguy
   • April 10, 2015

4. Hypothesis: The Observed 'Accelerating Expansion' of the Universe is Actually the Gravitational Entropy in the Changing Shape of Superclusters

   By metacogitans, May 1, 2015
   • 2 replies
   • 1.1k views
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   • Klaynos
   • May 1, 2015

5. Motion in a zero-energy universe

   By Genecks, May 19, 2015
   • 2 replies
   • 851 views
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   • swansont
   • May 19, 2015

6. Google Science Project 2015

   By metehanemlk, May 27, 2015
   • 2 replies
   • 976 views
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   • pavelcherepan
   • May 28, 2015

7. I need a mentor

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

8. No Craters Found on Pluto, Yet

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

9. Is Our Existence Abnormally Early?

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

10. 67P as an apple core

    By Enthalpy, February 17, 2015
    • 2 replies
    • 1.4k views
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    • Enthalpy
    • September 29, 2015

11. Universe from nothing vs Mirror Universe

    By Sorcerer, October 18, 2015
    • 2 replies
    • 1k views
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    • Sorcerer
    • October 18, 2015

12. Rate of expansion of the Universe

    By petrushka.googol, October 18, 2015
    • 2 replies
    • 1.1k views
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    • Mordred
    • November 10, 2015

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

    By stephaneww, December 10, 2015
    • 2 replies
    • 1.6k views
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    • stephaneww
    • December 10, 2015

14. The Paradigm of Types

    By types, February 6, 2016
    • 2 replies
    • 966 views
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    • imatfaal
    • February 6, 2016

15. space time

    By Andylee1, February 28, 2016
    • 2 replies
    • 1.1k views
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    • Strange
    • February 28, 2016

16. Astronomers Have Discovered a Super-Fast Star System That Seems to Break Current Physics Models

    By nec209, April 17, 2016
    • 2 replies
    • 1k views
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    • Delta1212
    • April 17, 2016

17. why does the daylight Moon appear to have a 'horizonal' shadow?

    By balladofserenity, May 8, 2016
    • 2 replies
    • 1.5k views
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    • Delta1212
    • May 8, 2016

18. Environment around a star becoming a red giant

    By SPBS, June 20, 2016
    • 2 replies
    • 973 views
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    • SPBS
    • June 27, 2016

19. Nature of a straight line in curved space

    By Atom Man, September 24, 2016
    • 2 replies
    • 918 views
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    • pavelcherepan
    • September 29, 2016

20. Arguable definition for the beginning of the universe?

    By Genecks, September 28, 2016
    • 2 replies
    • 1k views
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    • ajb
    • September 29, 2016

21. High energy gamma ray "magic" project

    By fred2014, October 3, 2016
    • 2 replies
    • 1.2k views
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    • fred2014
    • October 4, 2016

22. why there is no water om moon if,,,, it is aftermath of collision between earth and theia

    By qasimchef, October 22, 2016
    • 2 replies
    • 840 views
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    • Ophiolite
    • October 22, 2016

23. Gravitational_lensing_sky_observations

    By es111, December 8, 2016
    • 2 replies
    • 821 views
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    • AbstractDreamer
    • December 8, 2016

24. Exoplanet moons. Are they being detected?

    By Outrider, January 28, 2017
    • 2 replies
    • 896 views
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    • Outrider
    • January 28, 2017

25. Boundary condition at the Big Bang

    By Bill S, February 8, 2017
    • 2 replies
    • 1.1k views
    • 
    • Bill S
    • February 8, 2017