Part -1:

1. For this experiment to work we need to use two different locations to get the latitude, what are these locations?

2. Describe the method used to measure the Sun's shadow.

3. In the drawing on page 18 what are the letters b and d used for?

4. How can we get a more accurate measurement of the radius of the Earth using the method in the lab?

5. Why is there a difference between true solar noon and noon?

Part -2:

1) What is the definition of Parallax?

2) Describe how the Cross-staff is used to measure the amount of parallax.

3) Describe the procedure given in the manual for measuring the parallax angle and the distance to the star HT Cas.

4) What might cause your final results to not be as accurate? How can the accuracy be improved?

5) Extra Credit: The sun is 8.3 light-minutes away from the Earth. What is its parallax angle?

Light from the Earth takes 1.3 seconds to get to the Moon. What is the Moon's parallax angle?