NATS 1745 Lecture Notes - Lecture 2: The Moons
22 Jul 2017
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What do we see in the night sky. Ancient people observed the sky with the (cid:1441)naked eye(cid:1442) no telescope. Sun, moon, mercury, venus, mars, jupiter, saturn. Connected to days of week (spanish miercoles = mercury, etc) Gave rise to the significance of the number 7 in ancient cultures. As the earth rotates, the stars appear to move across the sky over time. Understanding the motions of objects in the sky is key for understanding the cosmos. Responsible for driving astronomical knowledge and scientific revolutions throughout history. We today know the reasons for the motions in the sky, but ancient ppl didnt. Ancient people became good at noticing, measuring, and predicting the changes in the sky. Objects rise in the east, set in the west. Due to the rotation of the earth, about its axis, every 1x24 hs. We see different stars, at different times of the year.
