1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Coordinates and astronomy

  1. Mar 9, 2013 #1
    1. The problem statement, all variables and given/known data
    Astronomer observing the sky with a small telescope by hole at the observatory in the middle of dome (lens diameter is much smaller than the diameter of the dome). Calculate the maximum time when astronomer can still observe objects near the celestial equator, without having to rotate the dome. Which side of the world will it be?
    Diameter dome: 5m, width hole: 1m, latitude: +50 °
    2. The attempt at a solution
    - circumference of the dome: dπ = 15, 7 m; it is 360° = 23h 56m 4 s = 86 164 s
    - width hole is part of circumference: 1m; it is 22, 9° of dome = 5488 s = 1,5 h

    So, the result is 1,5 h. I did not use latitude! Is it wrong?
    However, the question ,,Which side of the world will it be?" Hmmm, I don't know :-( I think it is west, but I can not explain why. Can you help me?

    Thanks and sorry for my bad English.
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Coordinates and astronomy
Loading...