Astronomy and Cosmology

3224 topics in this forum

1. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 19282 views
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   • swansont
   • August 3

2. Cosmological Principle

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   By Mordred, May 30, 2015
   • 49 replies
   • 21232 views
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   • YaDinghus
   • July 8

3. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 13423 views
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   • Altruist1
   • March 26, 2016

4. Astronomy links

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   By Martin, May 24, 2004
   • 102 replies
   • 78932 views
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   • tinalay91
   • January 6, 2016

5. How do we know that the universe is expanding when it could be simply stretching?

   By Achilles, Thursday at 07:53 PM
   • 3 replies
   • 60 views
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   • Strange
   • Thursday at 10:23 PM

6. Hubble paints picture of the evolving universe

   By beecee, Thursday at 09:33 PM
   • 0 replies
   • 21 views
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   • beecee
   • Thursday at 09:33 PM

7. Possible Detection of Oort Clouds around other Stars.

   By beecee, Thursday at 09:29 PM
   • 0 replies
   • 20 views
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   • beecee
   • Thursday at 09:29 PM
8. interpreting hubble data

   Topic was moved to forum Speculations

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

   By geordief, August 12
   • 5 replies
   • 112 views
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   • geordief
   • Wednesday at 05:27 PM

10. The maximum speed of transfer/propagation of information

    By geordief, August 1
    • 21 replies
    • 374 views
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    • Eise
    • Wednesday at 10:21 AM

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

    By beecee, Tuesday at 08:53 PM
    • 0 replies
    • 63 views
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    • beecee
    • Tuesday at 08:53 PM

12. Is the Universe infinite?

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    By dordle-loddle, August 1, 2017
    • 385 replies
    • 11638 views
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    • Strange
    • Tuesday at 09:20 AM

13. Galactic distribution of heavy elements

    By MarkE, December 11, 2017
    • 23 replies
    • 1007 views
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    • Cryptodiamond
    • Monday at 10:01 PM

14. Is Dark Matter really necessary?

    By Lazarus, July 27
    • 24 replies
    • 281 views
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    • StringJunky
    • August 3
15. Calculating (fixing) Hubble's Constant precisely at 70.98047

    Topic was moved to forum Speculations

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

    By Ghideon, August 1
    • 0 replies
    • 98 views
    • 
    • Ghideon
    • August 1

17. 103 minutes total lunar eclipse on July 27th 2018 - longest lunar eclipse this century.

    By koti, July 21
    • 0 replies
    • 86 views
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    • koti
    • July 21

18. Dark Energy and Non-Conservative Forces

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    By DLTherrien, July 6
    • 70 replies
    • 1124 views
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    • DLTherrien
    • July 21

19. Gravitational Wave Astronomy

    By Warped, July 19
    • 3 replies
    • 118 views
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    • Mordred
    • July 20

20. Space-time distortion and thoughts

    By Newcomer, July 14
    • 1 reply
    • 188 views
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    • Warped
    • July 17

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

    By beecee, July 11
    • 9 replies
    • 219 views
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    • Mordred
    • July 14

22. Matter and Antimatter

    By Done, July 11
    • 6 replies
    • 267 views
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    • Eise
    • July 12

23. Fermi Paradox According to Fox News

    By Airbrush, July 1
    • 12 replies
    • 378 views
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    • Airbrush
    • July 10

24. What is this moving light in the sky?

    By Jerry Wickey, September 5, 2013
    • 22 replies
    • 31137 views
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    • rangerx
    • July 7

25. The Nature of Spacetime:

    By beecee, July 6
    • 2 replies
    • 184 views
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    • beecee
    • July 7