수학과 천문학

http://wymarc.com/artifacts/classes/The%20Astrolabe%20in%20Theory%20and%20Practice.pdf

제작 http://www.eso.org/~ohainaut/bin/astrolabe.cgi

http://www.youtube.com/watch?v=yioZhHe1i5M

1. Constellations of the zodiac, 2009, http://www.youtube.com/watch?v=eeQwYrfmvoQ&feature=youtube_gdata_player.