Astronomy and Cosmology

3708 topics in this forum

1. A few questions

   By DTonesXD, May 19, 2014
   • 11 replies
   • 1.8k views
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   • Acme
   • May 20, 2014

2. How did hydrogen and helium gas collapse to form the first celestial object in the early universe?

   By TheSameDude, April 29, 2014
   • 14 replies
   • 1.8k views
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   • Mordred
   • May 12, 2014

3. Description of a photon

   By John0117, May 6, 2014
   • 11 replies
   • 2.3k views
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   • Enthalpy
   • May 11, 2014

4. Will this ever reach us? (question about expansion)

   By ccwebb, May 7, 2014
   • 9 replies
   • 1.8k views
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   • Mordred
   • May 9, 2014

5. Astronomers Create First Realistic Virtual Universe

   By Mordred, May 7, 2014
   • 1 reply
   • 1.1k views
   • 
   • Mordred
   • May 8, 2014

6. Whats past the singularity of a black hole?

   By kirbsrob, March 14, 2014
   • 7 replies
   • 1.8k views
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   • Mordred
   • May 8, 2014

7. lightcone calculator compatibility test

   By Mordred, May 7, 2014
   • 4 replies
   • 1.2k views
   • 
   • Mordred
   • May 8, 2014

8. Light transmission over large distances

   By John0117, May 6, 2014
   • 12 replies
   • 1.7k views
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   • swansont
   • May 7, 2014

9. Red Shift question(s) and Help

   By ccwebb, April 9, 2014
   • 13 replies
   • 1.9k views
   • 
   • Mordred
   • May 7, 2014

10. Big Rip vs Big Chill

    By SamBridge, April 30, 2014
    • 2 replies
    • 2.5k views
    • 
    • Mordred
    • May 7, 2014

11. Question about mass density of the universe

    By michel123456, May 4, 2014
    • 4 replies
    • 1.4k views
    • 
    • Mordred
    • May 7, 2014

12. How many planets in how little space?

    By Moontanman, May 2, 2014
    • 15 replies
    • 1.9k views
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    • Airbrush
    • May 5, 2014

13. Big Bang Theory? 1 2

    By SkyTeCh05, April 19, 2014
    • 30 replies
    • 4.3k views
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    • Ophiolite
    • April 25, 2014

14. Polaris

    By SkyTeCh05, April 18, 2014
    • 23 replies
    • 4k views
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    • SkyTeCh05
    • April 24, 2014

15. so many questions, so little time!!

    By poider, April 18, 2014
    • 10 replies
    • 1.7k views
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    • Airbrush
    • April 21, 2014

16. Why don't we make our calendar more rational and simple?

    By Myuncle, April 12, 2014
    • 17 replies
    • 1.8k views
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    • Phi for All
    • April 15, 2014

17. Orbital Decay

    By SaganWannaBeWannaBe, April 14, 2014
    • 1 reply
    • 881 views
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    • swansont
    • April 14, 2014

18. Four questions about cosmology

    By Cosmobrain, April 5, 2014
    • 5 replies
    • 1.3k views
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    • beefpatty
    • April 13, 2014

19. possibility uses

    By ajbesh, April 11, 2014
    • 5 replies
    • 1.3k views
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    • MigL
    • April 12, 2014

20. Why can't we go faster than light? 1 2 3 4 5

    By kirbsrob, March 15, 2014
    • 123 replies
    • 14.2k views
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    • CaptainPanic
    • April 11, 2014

21. Multiverse and dark energy (split from BICEP2 discussion)

    By NeoClassic, March 19, 2014
    • 7 replies
    • 1.8k views
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    • Schneibster
    • April 10, 2014

22. Is the amount of matter+energy of Universe constant? 1 2

    By dapifo, July 25, 2012
    • 25 replies
    • 12.3k views
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    • dapifo
    • April 7, 2014

23. Potential Dark Matter Thumbprint in Galactic Center Gamma

    By Schneibster, April 5, 2014
    • 0 replies
    • 816 views
    • 
    • Schneibster
    • April 5, 2014

24. Dark energy 1 2

    By thomma, January 19, 2012
    • 26 replies
    • 5.6k views
    • 
    • Schneibster
    • April 4, 2014

25. Binary Systems orbits

    By Romron, March 28, 2014
    • 3 replies
    • 1.2k views
    • 
    • Cosmobrain
    • March 31, 2014