Astronomy and Cosmology

3705 topics in this forum

1. Chance for the public to name the features of Pluto and Charon!

   By Mad For Science, April 11, 2015
   • 1 reply
   • 1k views
   • 
   • Airbrush
   • April 11, 2015

2. Does Jupiter orbit the Jupiter-Sun barycenter or not? 1 2 3 4

   By Robittybob1, February 18, 2015
   • 94 replies
   • 10.4k views
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   • Robittybob1
   • April 10, 2015

3. Electrodynamic Tethers as Generators

   By IResnick, April 6, 2015
   • 2 replies
   • 1.3k views
   • 
   • Moonguy
   • April 10, 2015

4. Dark matter/energy

   By between3and26characterslon, March 30, 2015
   • 3 replies
   • 1.2k views
   • 
   • Strange
   • April 6, 2015

5. Infinite Gravity of a Black Hole(or not)

   By IResnick, April 6, 2015
   • 4 replies
   • 1.2k views
   • 
   • ajb
   • April 6, 2015

6. What if life exists on other planets which are not like earth?

   By jagadeesh, April 3, 2015
   • 24 replies
   • 2.8k views
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   • MigL
   • April 6, 2015

7. Venus is retrograde ? Why ?

   By petrushka.googol, April 5, 2015
   • 1 reply
   • 1.2k views
   • 
   • Robittybob1
   • April 5, 2015

8. CMBR- How long ago are we observing?

   By Sorcerer, March 30, 2015
   • 8 replies
   • 1.4k views
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   • Strange
   • April 1, 2015

9. Dark matter and Shell Theorem by Isaac Newton 1 2 3

   By David Levy, March 16, 2015
   • 72 replies
   • 9.2k views
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   • Strange
   • March 26, 2015

10. How does Dark Energy affect Dark Matter

    By Chalkman, March 21, 2015
    • 2 replies
    • 1.3k views
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    • Mordred
    • March 26, 2015

11. Dark Matter explanation?

    By Billymcintosh, March 18, 2015
    • 4 replies
    • 1.6k views
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    • Strange
    • March 19, 2015

12. Basic Concepts of modern science 1 2 3

    By David Levy, March 11, 2015
    • 60 replies
    • 8.6k views
    • 
    • pantheory
    • March 19, 2015

13. How Could You Sustain a Disk Planet?

    By DiskWorld, March 19, 2015
    • 3 replies
    • 1.2k views
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    • Acme
    • March 19, 2015

14. Unknown Spectral Lines in Sunlight

    By EdEarl, March 19, 2015
    • 18 replies
    • 2.3k views
    • 
    • John Cuthber
    • March 19, 2015

15. Is Cosmic Censorship a requirement?

    By imatfaal, March 13, 2015
    • 4 replies
    • 1.1k views
    • 
    • Mordred
    • March 18, 2015

16. T = 0

    By petrushka.googol, March 15, 2015
    • 5 replies
    • 1.5k views
    • 
    • timo
    • March 15, 2015

17. Time and the Big Bang

    By petrushka.googol, March 15, 2015
    • 1 reply
    • 1.2k views
    • 
    • Mordred
    • March 15, 2015

18. Greatest Time Change ?

    By Airbrush, March 12, 2015
    • 3 replies
    • 1.2k views
    • 
    • swansont
    • March 14, 2015

19. Milky way galaxy mass vs. black hole mass 1 2 3

    By David Levy, January 24, 2015
    • 65 replies
    • 6.5k views
    • 
    • Strange
    • March 14, 2015

20. The Big Bang: Was there a singularity?

    By Sorcerer, March 12, 2015
    • 17 replies
    • 2.4k views
    • 
    • Phi for All
    • March 13, 2015

21. Temperature at beginning of Electroweak Epoch?

    By thebigdog, March 11, 2015
    • 6 replies
    • 1.8k views
    • 
    • Airbrush
    • March 12, 2015

22. The speed of the expansion of the universe at the beginning?

    By noctua, January 13, 2015
    • 8 replies
    • 1.6k views
    • 
    • Spyman
    • March 11, 2015

23. Black Holes

    By Kelnad, February 26, 2015
    • 7 replies
    • 1.7k views
    • 
    • pzkpfw
    • March 11, 2015

24. Earth Acceleration by New Moon

    By Bjarne, March 6, 2015
    • 4 replies
    • 1.2k views
    • 
    • Robittybob1
    • March 7, 2015

25. perihelion & lowest light-time don't coincide

    By MonDie, January 4, 2015
    • 7 replies
    • 2.1k views
    • 
    • MonDie
    • March 2, 2015