These notes are hints for using the Celestial Globe - all these topics are covered in detail in the lab, itself.

0 Note the Earth inside the globe - this is a geocentric, earth centered, view of the universe.

1 Locate:
    the Earth’s axis - where does it emerge from the celestial globe?
    the Celestial Equator - seam on the globe
    the ecliptic      - turn the knob which moves the Sun
                           - observe the path that the Sun traces
    Note the line the Sun traces and the dates on the line - this is the ecliptic, the path of the Sun over the year.
    The celestial meridian - this is the thread that we added to the Star Finder. When the Sun crosses the celestial meridian         what time is it?

    The horizon ring - note the cardinal points, N, E, S, and W and the azimuth printed on the horizon ring. 

    Azimuth is measured along the horizon ring from the north (0°), to east (90°), to south (180°), ...
    What letter, i.e. direction, is printed at 270°?
    The zenith - over head point - top of the celestial globe no matter how it is set

2 Measurements you will need on the Globe
    
    Declination, abbreviated DEC, analogous to latitude on Earth. Measured in degrees.
    Right Ascension, abbreviated R A, analogous to longitude but on measure eastward.  Note:  R A is measured in hours,         minutes and seconds.    

    DEC and RA are required to locate objects and place objects on the celestial globe (just like latitude and longitude on earth     or steet and avenue in Manhatten).

3 Setting Location on earth to NYC - latitude - adjust height (40° for NYC) and direction of the north star.  Make sure
    the north star, Polaris, is above the N on the horizon ring, i.e. north.

             - longitude - twirl the Earth so that the longitude of interest, NYC,
               is directly under the zenith - the high point of the globe.

4 Setting the date - Place the Sun on the appropriate date on the ecliptic.       

5 Setting the time - we are people of the Sun, so holding the Sun at the specified date position the Sun to set the time. 
For 6 AM or sunrise place the Sun on the eastern horizon, for noon place the Sun under the celestial meridian, for midnight place the Sun at the lowest point on the globe,  opposite the noon position.  Where would we place the Sun at sunset?
   (We will use 6:00 A.M. as sunrise, although in spring and summer it is earlier and in autumn and winter later.  Similarly,         we’ll use 6:00 P.M. as sunset.)