Astronomy and Cosmology

3714 topics in this forum

1. what is a black hole?

   By jamey2k9, February 8, 2009
   • 15 replies
   • 2.3k views
   • 
   • Klaynos
   • February 11, 2009

2. Underwater training for astronauts

   By khanna.rajeev90, February 6, 2009
   • 6 replies
   • 1.5k views
   • 
   • poonam.jain
   • February 9, 2009

3. blue shift galaxies

   By jeff Mitchel, February 5, 2009
   • 5 replies
   • 2k views
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   • jeff Mitchel
   • February 6, 2009

4. Why doesn't a long journey hinder photons?

   By Baby Astronaut, February 5, 2009
   • 1 reply
   • 761 views
   • 
   • Klaynos
   • February 5, 2009

5. if i launched a rocket out my back yard when would it have to be to get to the moon.

   By cameron marical, February 2, 2009
   • 8 replies
   • 1.9k views
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   • Airbrush
   • February 5, 2009

6. time and space

   By jamey2k9, February 1, 2009
   • 11 replies
   • 1.9k views
   • 
   • Airbrush
   • February 3, 2009

7. Spinning Earth

   By igosaur, February 2, 2009
   • 1 reply
   • 1.3k views
   • 
   • iNow
   • February 2, 2009

8. Gigantic hexagon in Saturn clouds

   By Baby Astronaut, January 31, 2009
   • 3 replies
   • 1.4k views
   • 
   • D H
   • January 31, 2009

9. Google earth (sky view)

   By empty, January 30, 2009
   • 0 replies
   • 902 views
   • 
   • empty
   • January 30, 2009

10. do galaxies orbit

    By jamey2k9, January 29, 2009
    • 5 replies
    • 3.7k views
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    • Martin
    • January 30, 2009

11. How many stars do dwarf galaxies have?

    By seriously disabled, December 31, 2008
    • 6 replies
    • 3.4k views
    • 
    • NowThatWeKnow
    • January 29, 2009

12. Frozen earth

    By devrimci_kürt, January 29, 2009
    • 4 replies
    • 1.2k views
    • 
    • scrappy
    • January 29, 2009

13. Black Hole collapse

    By bored_teen, January 21, 2009
    • 17 replies
    • 2.3k views
    • 
    • Royston
    • January 29, 2009

14. Toy model space that is not expanding into

    By Martin, January 25, 2009
    • 7 replies
    • 1.6k views
    • 
    • NowThatWeKnow
    • January 27, 2009

15. Hot Jupiters.

    By Gareth56, January 16, 2009
    • 11 replies
    • 2k views
    • 
    • NowThatWeKnow
    • January 25, 2009

16. 365 Days Of Astronomy.

    By interstellar, January 22, 2009
    • 0 replies
    • 901 views
    • 
    • interstellar
    • January 22, 2009

17. What would proving there's life on Mars do for science? 1 2

    By CrazCo, January 16, 2009
    • 36 replies
    • 4.9k views
    • 
    • Baby Astronaut
    • January 22, 2009

18. blackholes

    By Inquisitive Stone, January 17, 2009
    • 2 replies
    • 1.2k views
    • 
    • Ugouka
    • January 22, 2009

19. Where was the supernova that created the Solar System? 1 2

    By Reaper, January 7, 2009
    • 37 replies
    • 5.4k views
    • 
    • CaptainPanic
    • January 21, 2009

20. solar wind/jovian wind?

    By granpa, January 15, 2009
    • 15 replies
    • 2.1k views
    • 
    • CaptainPanic
    • January 21, 2009

21. galaxies receeding at the speed of light

    By johan01, January 20, 2009
    • 4 replies
    • 1.3k views
    • 
    • NowThatWeKnow
    • January 21, 2009

22. an unsolveble question?

    By jamey2k9, January 19, 2009
    • 4 replies
    • 1k views
    • 
    • petebro
    • January 20, 2009

23. observable and visible

    By devrimci_kürt, January 17, 2009
    • 7 replies
    • 1.5k views
    • 
    • swansont
    • January 18, 2009

24. Life on Mars?

    By igosaur, January 15, 2009
    • 7 replies
    • 1.7k views
    • 
    • devrimci_kürt
    • January 16, 2009

25. Is universe expanding?

    By Dark_anzel, January 15, 2009
    • 3 replies
    • 1.1k views
    • 
    • Klaynos
    • January 15, 2009