Astronomy and Cosmology

3708 topics in this forum

1. There may be 14 antimatter objects hiding in the Milky Way. These objects are called anti-stars.

   By SergUpstart, May 4, 2021
   • 8 replies
   • 1.4k views
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   • swansont
   • May 5, 2021

2. black holes

   By Avia, May 30, 2009
   • 8 replies
   • 1.4k views
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   • Airbrush
   • June 3, 2009

3. Cosmic Microwave Background Anisotropies

   By BJC, April 4, 2011
   • 3 replies
   • 1.4k views
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   • Spyman
   • April 5, 2011

4. Artificial Gravity on Spacestation

   By Airbrush, February 19, 2013
   • 7 replies
   • 1.4k views
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   • ARMF
   • February 21, 2013

5. New exoplanet candidate found in the habitable zone of the closest star system

   By USer2343, February 28, 2021
   • 7 replies
   • 1.4k views
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   • beecee
   • May 3, 2021

6. Is the same goof being committed in other planets ?

   By Externet, January 21, 2013
   • 8 replies
   • 1.4k views
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   • D H
   • January 24, 2013

7. The Universe, Never ending, Never Starting

   By dude2k5, February 4, 2007
   • 5 replies
   • 1.4k views
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   • Norman Albers
   • February 11, 2007

8. Multiple dimensions of space

   By jackonaut, January 25, 2006
   • 4 replies
   • 1.4k views
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   • timo
   • January 25, 2006

9. The likely effects of gravity waves (should they exist)

   By GeeKay, April 26, 2013
   • 7 replies
   • 1.4k views
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   • imatfaal
   • May 3, 2013

10. Were they closer to the sun?

    By TransformerRobot, July 24, 2013
    • 9 replies
    • 1.4k views
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    • swansont
    • July 25, 2013

11. Galaxies and star formation

    By sunspot, December 22, 2005
    • 9 replies
    • 1.4k views
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    • insane_alien
    • December 22, 2005

12. Could signal encryption explain the Fermi Paradox?

    By TakenItSeriously, November 24, 2019
    • 6 replies
    • 1.4k views
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    • Airbrush
    • August 19, 2020

13. The strong force question/proposal

    By QuantumT, June 12, 2021
    • 5 replies
    • 1.4k views
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    • QuantumT
    • June 23, 2021

14. a dent in a tin can

    By YT2095, February 15, 2006
    • 6 replies
    • 1.4k views
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    • Snake_Arts
    • February 16, 2006

15. Mass of an exoplanet

    By alext87, March 2, 2006
    • 2 replies
    • 1.4k views
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    • Martin
    • March 2, 2006

16. The hidden universe????

    By srimukh, May 16, 2009
    • 7 replies
    • 1.4k views
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    • prodigenius
    • May 17, 2009

17. A theory on the Universe expanding

    By Skins, November 10, 2015
    • 7 replies
    • 1.4k views
    • 
    • Skins
    • November 11, 2015

18. Use of time dilation by advanced alien civilization

    By Nerexis, July 20, 2016
    • 3 replies
    • 1.4k views
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    • swansont
    • July 21, 2016

19. The Atlas of the Universe

    By Reaper, March 5, 2008
    • 5 replies
    • 1.4k views
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    • iNow
    • March 8, 2008

20. Dark energy & Expanding Universe

    By 25Hz, May 28, 2012
    • 4 replies
    • 1.4k views
    • 
    • Spyman
    • February 20, 2013

21. stars

    By sciman, October 4, 2007
    • 4 replies
    • 1.4k views
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    • insane_alien
    • October 5, 2007

22. We're getting farther from the Great Attractor (anyone have details on this?)

    By Martin, January 30, 2010
    • 0 replies
    • 1.4k views
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    • Martin
    • January 30, 2010

23. Voyager mission

    By Curiousabout, August 15, 2014
    • 5 replies
    • 1.4k views
    • 
    • Nicholas Kang
    • August 18, 2014

24. Universes Not With Different Versions, But Locations

    By jhcrue, December 19, 2014
    • 6 replies
    • 1.4k views
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    • Phi for All
    • October 14, 2015

25. Binary Star

    By kragg, October 16, 2006
    • 7 replies
    • 1.4k views
    • 
    • [Tycho?]
    • October 17, 2006