Astronomy and Cosmology

3710 topics in this forum

1. Hubble paints picture of the evolving universe

   By beecee, August 16, 2018
   • 0 replies
   • 628 views
   • 
   • beecee
   • August 16, 2018

2. Possible Detection of Oort Clouds around other Stars.

   By beecee, August 16, 2018
   • 0 replies
   • 570 views
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   • beecee
   • August 16, 2018

3. The idea that the universe may have started with a quantum fluctuation

   By geordief, August 12, 2018
   • 5 replies
   • 1.1k views
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   • geordief
   • August 15, 2018

4. The maximum speed of transfer/propagation of information

   By geordief, August 1, 2018
   • 21 replies
   • 1.9k views
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   • Eise
   • August 15, 2018

5. Is this/Can this be the "obvious"answer to the DM conundrum?

   By beecee, August 14, 2018
   • 0 replies
   • 745 views
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   • beecee
   • August 14, 2018

6. Is the Universe infinite? 1 2 3 4 16

   By dordle-loddle, August 1, 2017
   • 385 replies
   • 43.7k views
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   • Strange
   • August 14, 2018

7. Galactic distribution of heavy elements

   By MarkE, December 11, 2017
   • 23 replies
   • 2.8k views
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   • Cryptodiamond
   • August 13, 2018

8. Is Dark Matter really necessary?

   By Lazarus, July 27, 2018
   • 24 replies
   • 1.8k views
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   • StringJunky
   • August 3, 2018

9. Is a soap bubble a valid analogy for the expansion of space?

   By Ghideon, August 1, 2018
   • 0 replies
   • 857 views
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   • Ghideon
   • August 1, 2018

10. 103 minutes total lunar eclipse on July 27th 2018 - longest lunar eclipse this century.

    By koti, July 21, 2018
    • 0 replies
    • 602 views
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    • koti
    • July 21, 2018

11. Dark Energy and Non-Conservative Forces 1 2 3

    By DLTherrien, July 6, 2018
    • 70 replies
    • 5.3k views
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    • DLTherrien
    • July 21, 2018

12. Gravitational Wave Astronomy

    By Warped, July 19, 2018
    • 3 replies
    • 773 views
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    • Mordred
    • July 20, 2018

13. Space-time distortion and thoughts

    By Newcomer, July 14, 2018
    • 1 reply
    • 805 views
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    • Warped
    • July 17, 2018

14. Could gravitational waves reveal how fast our universe is expanding?

    By beecee, July 11, 2018
    • 9 replies
    • 1.1k views
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    • Mordred
    • July 14, 2018

15. Matter and Antimatter

    By Done, July 11, 2018
    • 6 replies
    • 1.8k views
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    • Eise
    • July 12, 2018

16. Fermi Paradox According to Fox News

    By Airbrush, July 1, 2018
    • 12 replies
    • 1.6k views
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    • Airbrush
    • July 10, 2018

17. What is this moving light in the sky?

    By Jerry Wickey, September 5, 2013
    • 22 replies
    • 42.8k views
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    • rangerx
    • July 7, 2018

18. The Nature of Spacetime:

    By beecee, July 6, 2018
    • 2 replies
    • 775 views
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    • beecee
    • July 7, 2018

19. Light and the event horizon?

    By Butch, July 6, 2018
    • 2 replies
    • 970 views
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    • Butch
    • July 6, 2018

20. A centre of mass of the Universe. 1 2 3

    By geordief, June 24, 2018
    • 70 replies
    • 7.4k views
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    • Mordred
    • June 27, 2018

21. Expansion - No Added Energy Required

    By Much Ado, June 27, 2018
    • 1 reply
    • 721 views
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    • J.C.MacSwell
    • June 27, 2018

22. Is this the Dark Matter Particle?

    By beecee, June 9, 2018
    • 14 replies
    • 1.6k views
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    • YaDinghus
    • June 23, 2018

23. Black Holes Tutorial for lay people;

    By beecee, June 15, 2018
    • 5 replies
    • 855 views
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    • beecee
    • June 15, 2018

24. Location of Pioneer 1 & 2

    By Nero, June 9, 2018
    • 23 replies
    • 2.3k views
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    • swansont
    • June 15, 2018

25. Black Holes and/or Wormholes:

    By beecee, June 12, 2018
    • 2 replies
    • 874 views
    • 
    • beecee
    • June 15, 2018