Lecture 3 - Lecture 3 9/2/10 Sidereal day is 4 minutes...

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Lecture 3 – 9/2/10 Sidereal day is 4 minutes shorter than the solar day when the earth is orbiting the same way its turning Key idea is that we can learn facts about nature by systematically observing and experimenting a) The results must be verifiable, reproduced, and repeatable by others Theories must be testable and then it can be verifiable and/or modifiable Scientific theories proved verifiable aren’t necessarily correct a) Only correct in the current domain Aristotle a) Noted that the moon is spherical due to its phases i) Boundary between day and night on the moon is called the terminator ii) Terminator is always round b) Saw that the sun is farther away than the moon also due to the phases c) Said earth is spherical due to the shadow of the earth during eclipses Aristarchus of Samos a) Thought the earth moved around the sun b) Aristotle disproved the theory by using parallax Eratosthenes a)
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Lecture 3 - Lecture 3 9/2/10 Sidereal day is 4 minutes...

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