Astronomy and Cosmology

3591 topics in this forum

1. Astronomy links 1 2 3 4 5

   By Martin, May 24, 2004
   • 105 replies
   • 95.2k views
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   • swansont
   • June 25, 2021

2. Cosmological Principle 1 2 3

   By Mordred, May 30, 2015
   • 52 replies
   • 32k views
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   • michel123456
   • June 22, 2020

3. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 26k views
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   • swansont
   • August 3, 2018

4. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 19.3k views
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   • Altruist1
   • March 26, 2016

5. Expansion different in different directions 1 2 3 4 6

   By Bmpbmp1975, April 8, 2020
   • 125 replies
   • 352k views
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   • swansont
   • April 27, 2020

6. Where Does Space End? It Must End Somewhere! 1 2 3 4 41

   By Edisonian, October 6, 2004
   • 1k replies
   • 308.4k views
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   • hypervalent_iodine
   • November 24, 2016

7. Generational craft (split from Terraforming the Solar System) 1 2

   By Airbrush, September 2, 2020
   • 29 replies
   • 207.3k views
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   • Ken Fabian
   • September 5, 2020

8. Hypothetical sci-fi question about wormholes and elapsed time between the 2 points 1 2

   By Pmfr, October 29, 2020
   • 35 replies
   • 126.7k views
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   • Pmfr
   • November 15, 2020

9. Is there the proof of heliocentrism? 1 2

   By molbol2000, October 18, 2020
   • 30 replies
   • 101.2k views
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   • CharonY
   • October 19, 2020

10. Where does the moon rise?

    By Primarygun, July 25, 2007
    • 17 replies
    • 92.9k views
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    • D H
    • January 30, 2012

11. An infinite and eternal universe 1 2

    By ProximaCentauri, April 6, 2020
    • 35 replies
    • 66.5k views
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    • beecee
    • January 19, 2021

12. How does one compute the sideways velocity of a planet? 1 2

    By captcass, December 29, 2020
    • 31 replies
    • 62.6k views
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    • Phi for All
    • December 30, 2020

13. "Shocking" video of comet ISON causes "panic"?!? 1 2 3

    By sevenseas, June 8, 2013
    • 53 replies
    • 47.6k views
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    • Mr Monkeybat
    • October 3, 2013

14. Who said the Universe had a beginning? 1 2 3 4

    By Gater, August 11, 2019
    • 97 replies
    • 46.3k views
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    • swansont
    • September 5, 2019

15. Gravity waves and the aether 1 2 3 4 32

    By Moontanman, June 16, 2016
    • 779 replies
    • 42.5k views
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    • imatfaal
    • September 6, 2016

16. What is this moving light in the sky?

    By Jerry Wickey, September 5, 2013
    • 22 replies
    • 40.6k views
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    • rangerx
    • July 7, 2018

17. Is space folding a good method of space travel (if it is for real) 1 2

    By Lekgolo555, February 10, 2007
    • 42 replies
    • 35.5k views
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    • Feralwrath
    • January 22, 2018

18. Is the Earth close to the center of the Universe ? 1 2

    By MaximT, January 16, 2020
    • 25 replies
    • 33.1k views
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    • beecee
    • February 18, 2020

19. Treasure From Asteroids 1 2

    By Airbrush, July 25, 2019
    • 36 replies
    • 33k views
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    • Moontanman
    • October 13, 2019

20. If there is no end to the space 1 2 3 4 11

    By HamsterPower, January 14, 2011
    • 263 replies
    • 28.5k views
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    • owl
    • March 24, 2011

21. How do concentrations of dark matter arise? 1 2

    By Eise, October 1, 2019
    • 48 replies
    • 25.7k views
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    • swansont
    • October 15, 2020

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

    By dordle-loddle, August 1, 2017
    • 385 replies
    • 24.8k views
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    • Strange
    • August 14, 2018

23. I finally found an accurate article on the speed of universal expansion 1 2 3

    By Angelo, January 10, 2020
    • 58 replies
    • 22.5k views
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    • MaximT
    • January 16, 2020

24. Can we see it? 1 2 3 4 9

    By michel123456, March 16, 2010
    • 206 replies
    • 19.5k views
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    • Spyman
    • May 6, 2010

25. Need some astronomy help

    By CaptainHawk1, October 25, 2007
    • 6 replies
    • 19.4k views
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    • grifter
    • October 27, 2007