Astronomy and Cosmology

3686 topics in this forum

1. What would SETI pick up from Earth's signals?

   By CaptainPanic, April 22, 2009
   • 2 replies
   • 884 views
   • 
   • Megabrain
   • April 22, 2009

2. Stephen Hawking, ill...

   By jackson33, April 20, 2009
   • 3 replies
   • 1.1k views
   • 
   • Megabrain
   • April 20, 2009

3. red giants

   By thedarkshade, April 17, 2009
   • 5 replies
   • 1.3k views
   • 
   • thedarkshade
   • April 20, 2009

4. light in two places at once

   By jamey2k9, April 15, 2009
   • 6 replies
   • 1.5k views
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   • Kyrisch
   • April 19, 2009

5. What would happen if Earths magnetic field turned off?

   By Inquisitor, March 27, 2009
   • 23 replies
   • 11.1k views
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   • rebelion
   • April 19, 2009

6. Is LIGO just observing viscosity of the vacuum?

   By Duda Jarek, April 19, 2009
   • 0 replies
   • 815 views
   • 
   • Duda Jarek
   • April 19, 2009

7. expansion

   By jjuris, April 17, 2009
   • 2 replies
   • 869 views
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   • Martin
   • April 18, 2009

8. Assuming a black hole

   By AO2012, April 17, 2009
   • 10 replies
   • 1.5k views
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   • AO2012
   • April 18, 2009

9. darkness

   By A Childs Mind, April 10, 2009
   • 19 replies
   • 2k views
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   • Airbrush
   • April 14, 2009

10. some phenomenon?

    By chitrangda, April 13, 2009
    • 6 replies
    • 1.4k views
    • 
    • Martin
    • April 13, 2009

11. Dark matter

    By CaptainPanic, April 8, 2009
    • 13 replies
    • 1.8k views
    • 
    • Airbrush
    • April 11, 2009

12. space's relation to the subatomic world

    By wade.daniel.w, April 8, 2009
    • 12 replies
    • 1.7k views
    • 
    • swansont
    • April 9, 2009

13. Observing black hole mergers (conference on signs to look for, computer sims)

    By Martin, March 19, 2009
    • 11 replies
    • 1.6k views
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    • Airbrush
    • April 2, 2009

14. Information Paradox Abstract Theory

    By bsimecek, April 1, 2009
    • 4 replies
    • 960 views
    • 
    • Martin
    • April 2, 2009

15. Life cycle remain

    By DMD_Gannon, March 10, 2009
    • 3 replies
    • 889 views
    • 
    • GDG
    • March 30, 2009

16. Water Transport to Habitable Planets

    By Widdekind, March 16, 2009
    • 1 reply
    • 965 views
    • 
    • GDG
    • March 30, 2009

17. what is the universe expanding into? 1 2 3 4 5

    By cameron marical, January 24, 2009
    • 105 replies
    • 12.1k views
    • 
    • Martin
    • March 30, 2009

18. Why is Moon so round and spinless?

    By Inquisitor, March 27, 2009
    • 19 replies
    • 7.6k views
    • 
    • Sisyphus
    • March 30, 2009

19. Solar flares and protecting my electronic data

    By CaptainPanic, March 27, 2009
    • 3 replies
    • 4.3k views
    • 
    • NowThatWeKnow
    • March 29, 2009

20. light speed 1 2

    By jamey2k9, March 1, 2009
    • 35 replies
    • 3.5k views
    • 
    • lakmilis
    • March 29, 2009

21. Geostationary orbit ?

    By Externet, March 11, 2009
    • 11 replies
    • 1.4k views
    • 
    • dirtyamerica
    • March 28, 2009

22. My Equation For "Doomsday"

    By Nick299792458, March 18, 2009
    • 5 replies
    • 1.3k views
    • 
    • lakmilis
    • March 27, 2009

23. HELP ! construction of payload

    By Christiana, February 17, 2009
    • 19 replies
    • 2.2k views
    • 
    • lakmilis
    • March 27, 2009

24. How Habitable Zones depend on Eccentricity

    By Widdekind, March 15, 2009
    • 15 replies
    • 1.9k views
    • 
    • Martin
    • March 20, 2009

25. Is there more to light than meets the eye ?

    By purintjp, March 19, 2009
    • 4 replies
    • 819 views
    • 
    • swansont
    • March 19, 2009