with Neotropical Migratory Birds
Their Way--The Stars as a Compass
The reproducible patterns are identical in size when you print them
off the Internet. You will need to make adjustments on your photocopier
to reduce the size of the black circle. The black circle must fit on
top of the white circle to cover everything but the names of the months,
which should show around the perimeter of the Sky Map Star Clock.
B. After you have successfully
determined the necessary reduction for the black circle, photocopy and
cut out the two circle patterns. Remember to cut out the small white
viewing window in the black circle too.
C. Assemble your Sky Map
Star Clock by centering the black circle on top of the white circle.
The names of the months should appear evenly around the perimeter. Insert
a brass paper fasterner through the North Star on the (smaller) black
circle to make a rotating wheel.
Move the top wheel so the window shows 9 PM, then 10 PM, and all the
hours throughout the night. Watch to see what happens to the position
of the North Star as the night hours pass. What happens to all the other
time with your Sky Map Star Clock! Go outdoors on a clear night. Find
the Big Dipper, Little Dipper, and Cassiopeia. Face north. The pointer
stars in the Big Dipper and Little Dipper will help you find the North
Star. Hold the Sky Map Star Clock so the current month is at the top
as you face north. Then rotate the wheel with the stars until the constellations
line up the same way as the stars in the sky. Read the time that shows
in the window!