Astronomy and Cosmology

3341 topics in this forum

1. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 21020 views
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   • swansont
   • August 3, 2018

2. Cosmological Principle

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   By Mordred, May 30, 2015
   • 49 replies
   • 24031 views
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   • YaDinghus
   • July 8, 2018

3. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 14899 views
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   • Altruist1
   • March 26, 2016

4. Astronomy links

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   By Martin, May 24, 2004
   • 102 replies
   • 83932 views
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   • tinalay91
   • January 6, 2016

5. Multiverse (split from Discussable Topics)

   By beecee, Saturday at 12:25 AM
   • 2 replies
   • 50 views
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   • beecee
   • Saturday at 12:32 AM

6. Neil deGrasse Tyson says it’s ‘very likely’ the universe is a simulation

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   By Polinski, Friday at 08:51 PM
   • 30 replies
   • 279 views
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   • swansont
   • Friday at 10:08 PM

7. Jupiter Abyss: APOD:

   By beecee, June 16
   • 10 replies
   • 231 views
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   • beecee
   • Wednesday at 08:52 PM

8. Mars colony of 500,000 people may not be possible

   By nec209, June 15
   • 18 replies
   • 253 views
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   • zapatos
   • June 18

9. Do we need to go light speed

   By Curious layman, June 15
   • 4 replies
   • 124 views
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   • Ghideon
   • June 15

10. Star's habitable zone?

    By Moontanman, June 8
    • 6 replies
    • 152 views
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    • Moontanman
    • June 9
11. Calculation of the 11-year period of solar activity. Other reality

    Topic was moved to forum Speculations

12. Can gravitational waves be affected by matter?

    By Ghideon, May 21
    • 21 replies
    • 362 views
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    • MigL
    • May 28

13. A question about gravity

    By awaterpon, May 26
    • 1 reply
    • 150 views
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    • swansont
    • May 26

14. What is the universe?

    By PrimalMinister, May 23
    • 21 replies
    • 242 views
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    • Sensei
    • May 24

15. Venus questions (split from Venus cooled off?)

    By Prometheus, May 23
    • 2 replies
    • 90 views
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    • dimreepr
    • May 23

16. Could Parallel Universes Be Physically Real?

    By Strange, May 23
    • 3 replies
    • 128 views
    • 
    • dimreepr
    • May 23

17. Lunar Tunnels and Moon Colonies:

    By beecee, May 11
    • 19 replies
    • 297 views
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    • Endy0816
    • May 21

18. Gravitational Interferometer and Kalman

    By Enthalpy, July 19, 2014
    • 10 replies
    • 1140 views
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    • Enthalpy
    • May 19

19. Jumbo Jet spaceships to the outer planets

    By Gian, May 17
    • 2 replies
    • 116 views
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    • Gian
    • May 18

20. Is Earth's atmosphere transparent one way only?

    By Moreno, May 17
    • 7 replies
    • 158 views
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    • pzkpfw
    • May 18

21. Planetary Migration:

    By beecee, May 10
    • 10 replies
    • 258 views
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    • Moontanman
    • May 12

22. Infinite gravity

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    By awaterpon, May 2
    • 34 replies
    • 779 views
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    • Strange
    • May 9

23. Science terms and science questions

    By Wolte, May 1
    • 14 replies
    • 281 views
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    • Strange
    • May 2

24. Why is there something rather than nothing?

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    By Vexen, March 16
    • 48 replies
    • 2149 views
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    • koti
    • May 1

25. Black Hole: Why do we believe that matter could be such dense?

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    By MaximT, April 13
    • 93 replies
    • 2229 views
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    • Strange
    • April 23