HIST 1250 Lecture Notes - Lecture 2: Celestial Spheres, Ancient Greek Astronomy, Sublunary Sphere
3 Feb 2017
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Finding our place in the universe, part 1: Sun rose in the same place (roughly) each day, position in the sky told you how much time was left in the day. Would quickly notice the strange changes of the moon. Left traces on cave walls, carved into bones. People start to keep track of the moon cause it looks different from the night before. They connected in cycles of the moon a(cid:374)d the (cid:272)(cid:455)(cid:272)le of a (cid:449)o(cid:373)a(cid:374)(cid:859)s (cid:272)(cid:455)(cid:272)le. Actions of the heavens could affect like on earth. Appearance of comets as harbingers of doom. Can use the night sky as a clock. Use of the sky as a calendar. As the earth goes arou(cid:374)d the su(cid:374), (cid:449)e(cid:859)re at the sa(cid:373)e poi(cid:374)t i(cid:374) our or(cid:271)it at the same time each year. A relia(cid:271)le (cid:272)ale(cid:374)dar (cid:271)e(cid:272)ause it(cid:859)s (cid:271)ased o(cid:374) (cid:374)ature. A good use of telling time and day for growing crops. The nile floods every year at the same time.
