Astronomy and Cosmology

3705 topics in this forum

1. Calculating age of the universe using redshift?

   By zeion, March 16, 2010
   • 0 replies
   • 646 views
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   • zeion
   • March 16, 2010

2. Nanotech for Space Exploration

   By Airbrush, March 13, 2010
   • 4 replies
   • 1k views
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   • bascule
   • March 15, 2010

3. At what redshift does energy density of matter = energy density of radiation?

   By zeion, March 15, 2010
   • 2 replies
   • 2.6k views
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   • zeion
   • March 15, 2010

4. big bang theory

   By quantum125, March 14, 2010
   • 3 replies
   • 1.1k views
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   • Radical Edward
   • March 15, 2010

5. How hungry are black holes

   By Johanluus, March 12, 2010
   • 23 replies
   • 2.4k views
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   • Arch2008
   • March 15, 2010

6. no gravity, no space time

   By hewj11, March 5, 2010
   • 20 replies
   • 2.9k views
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   • michel123456
   • March 13, 2010

7. Unidentified 500 km crater on Oberon moon ??

   By Widdekind, March 12, 2010
   • 0 replies
   • 1k views
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   • Widdekind
   • March 12, 2010

8. Does Moon revolves itself ? 1 2 3 4

   By pravin.sonar, February 12, 2010
   • 76 replies
   • 9.3k views
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   • John Cuthber
   • March 11, 2010

9. Extremophiles on Viking

   By VedekPako, March 7, 2010
   • 4 replies
   • 1.3k views
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   • CaptainPanic
   • March 9, 2010

10. Asteroids - Sphericity & Solidity associated?

    By Widdekind, February 20, 2010
    • 2 replies
    • 1.2k views
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    • Widdekind
    • March 8, 2010

11. A question.

    By Braincandy, March 6, 2010
    • 4 replies
    • 1.3k views
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    • Radical Edward
    • March 6, 2010

12. Human Inluenced life

    By mulreay, March 5, 2010
    • 5 replies
    • 1k views
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    • KennyC
    • March 5, 2010

13. 8 minutes for the Sun's light to reach the earth?

    By dstebbins, February 23, 2010
    • 11 replies
    • 1.9k views
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    • Iggy
    • March 5, 2010

14. Golddie-locks Zone and Red Dwarfs

    By VedekPako, March 3, 2010
    • 8 replies
    • 1.6k views
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    • Airbrush
    • March 4, 2010

15. Entropy in the Universe

    By OSHMUNNIES, February 28, 2010
    • 4 replies
    • 1.4k views
    • 
    • hewj11
    • March 2, 2010

16. A study of the formation of Quasars

    By yheyman, February 1, 2010
    • 3 replies
    • 1.5k views
    • 
    • Martin
    • February 25, 2010

17. Wormholes

    By Deadmeat, February 11, 2010
    • 13 replies
    • 2.2k views
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    • Airbrush
    • February 23, 2010

18. Is Jupiter ALMOST a dwarf star?

    By dstebbins, February 17, 2010
    • 9 replies
    • 2.7k views
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    • Airbrush
    • February 21, 2010

19. Branes and Dark Energy

    By lawman, February 21, 2010
    • 0 replies
    • 602 views
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    • lawman
    • February 21, 2010

20. Can a Virus survive in space? Random thoughts

    By Law, February 17, 2010
    • 9 replies
    • 10.8k views
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    • Mr Skeptic
    • February 19, 2010

21. Sun and time

    By midgetwars, February 12, 2010
    • 9 replies
    • 1.6k views
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    • Kyrisch
    • February 18, 2010

22. The fate of the sun In the Holy Quran

    By Marshal86, February 18, 2010
    • 1 reply
    • 866 views
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    • swansont
    • February 18, 2010

23. Massive Entry Heats Up Atmosphere

    By VedekPako, February 10, 2010
    • 15 replies
    • 1.7k views
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    • VedekPako
    • February 16, 2010

24. What would be the size of the event horizon for the whole universe

    By Neil9327, February 14, 2010
    • 2 replies
    • 997 views
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    • ajb
    • February 15, 2010

25. how big is the universe? 1 2

    By gib65, December 23, 2009
    • 39 replies
    • 5k views
    • 
    • Chriton
    • February 10, 2010