The celestial sphere

For next class, do a little reading about the celestial sphere - maybe even play with the first website below.  If you have time, also look into "circumpolar stars".

Celestial Sphere

Celestial sphere sites

The first site allows you to simulate the apparent motion of the Sun around the Earth for any day of the year (and location).  It's really cool to play around with.

http://astro.unl.edu/naap/motion3/animations/sunmotions.swf

http://www.astronomynotes.com/nakedeye/csph1t5.htm

http://www.astronomynotes.com/nakedeye/s4.htm