Worksheet on Using the Astrolabe

Following instructions for using the astrolabe in “Project 28: Making an Astrolabe". Your teacher will also explain how to use it.

1. If Spica is 10^o above the horizon towards the east, what is its exact azimuth?



2. For the position of Spica above, give the altitude and azimuth of

a) Arcturus


b) Aldebaran


c) Betelgeuse


d) Alphard


3. What time does the sun rise and set on December 20th? How long is daylight?



4. What time does the sun rise and set on June 20th (day light savings)? How long is daylight?



5. What times does Arcturus rise and set on October 10th?