Astronomy and Cosmology

3713 topics in this forum

1. Cosmocalc now good on SFN

   By Mordred, October 3, 2017
   • 0 replies
   • 715 views
   • 
   • Mordred
   • October 3, 2017

2. Black Holes 1 2

   By Paritosh Sontake, September 12, 2017
   • 44 replies
   • 4.4k views
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   • Dubbelosix
   • September 30, 2017

3. Big Bang not an instance of something from nothing? 1 2 3

   By Alfred001, July 26, 2017
   • 64 replies
   • 8.1k views
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   • Mordred
   • September 30, 2017

4. Big Bang evidence discarded ... Not

   By Strange, September 16, 2017
   • 6 replies
   • 1.4k views
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   • Dubbelosix
   • September 28, 2017

5. A planet made of humans

   By Encryptor, September 27, 2017
   • 6 replies
   • 1.5k views
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   • Encryptor
   • September 28, 2017

6. Value of an Asteroid

   By Airbrush, September 15, 2017
   • 21 replies
   • 2.9k views
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   • Enthalpy
   • September 26, 2017

7. Failed supernova in NGC 6946

   By DanTrentfield, May 31, 2017
   • 13 replies
   • 2.7k views
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   • DanTrentfield
   • September 24, 2017

8. Lack of magnetic field on Mars

   By Silvestru, September 13, 2017
   • 6 replies
   • 1.7k views
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   • swansont
   • September 22, 2017

9. Interference vs. Lensing 1 2

   By AbnormallyHonest, September 11, 2017
   • 42 replies
   • 5.1k views
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   • John Cuthber
   • September 20, 2017

10. Shoemaker Levy comet explosion

    By Elite Engineer, September 19, 2017
    • 6 replies
    • 1.3k views
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    • Mordred
    • September 20, 2017

11. Worth of the sun?

    By Encryptor, September 11, 2017
    • 17 replies
    • 2.7k views
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    • Encryptor
    • September 18, 2017

12. The Big Bang Theory, Expansion/Inflation plus "Explosion" 1 2

    By geordief, September 9, 2017
    • 28 replies
    • 3.3k views
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    • Area54
    • September 13, 2017

13. sound in space 1 2

    By maitri, August 26, 2017
    • 30 replies
    • 3.5k views
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    • mistermack
    • September 13, 2017

14. What do you think of this possible explanation of the red staining seen on Europa and a possible test for life on Europa?

    By gedsaz, September 12, 2017
    • 1 reply
    • 830 views
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    • beecee
    • September 13, 2017

15. Accelerating Expansion of the Universe?

    By Cosmo_Ken, September 1, 2017
    • 14 replies
    • 2.4k views
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    • Mordred
    • September 8, 2017

16. 15 days of darkness

    By Ixquehte, August 22, 2017
    • 7 replies
    • 1.3k views
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    • Janus
    • August 24, 2017

17. An Idea That I Have

    By alexcouch, August 13, 2017
    • 10 replies
    • 2k views
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    • Airbrush
    • August 22, 2017

18. Solar eclipse: why the shadow goes that way

    By Counterintuitive, August 19, 2017
    • 0 replies
    • 1.2k views
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    • Counterintuitive
    • August 19, 2017

19. Exomoons and the mass of exoplanets

    By Ed Joyce, March 26, 2012
    • 15 replies
    • 3.3k views
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    • Ed Joyce
    • August 14, 2017

20. An arxiv paper: A layman's explanation needed.

    By beecee, August 10, 2017
    • 4 replies
    • 1k views
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    • Mordred
    • August 12, 2017

21. 40TH Anniversary: NASAs Longest and Farthest.

    By beecee, August 4, 2017
    • 10 replies
    • 1.4k views
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    • beecee
    • August 11, 2017

22. New Instrumentation and Gravitational Radiation.

    By beecee, July 17, 2017
    • 6 replies
    • 1.3k views
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    • Mordred
    • August 11, 2017

23. Anti-Gravity??

    By NishanC, August 4, 2017
    • 9 replies
    • 2.4k views
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    • MigL
    • August 10, 2017

24. How reliable are estimates of asteroid mineral content?

    By Ken Fabian, August 6, 2017
    • 8 replies
    • 1.6k views
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    • Mordred
    • August 9, 2017

25. Transuranic elements in a star

    By Moontanman, July 21, 2017
    • 19 replies
    • 4.8k views
    • 
    • Area54
    • August 1, 2017