NATS 1570 Lecture 8: Lecture 8
9 Mar 2017
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Document Summary
When we talk about a planet we can define some different rotational periods. Year this is how long it takes an object to orbit the sun. Rotation on the axis - this is how long it takes an object to turn on its axis. Day - the period from sunrise to sunrise. For example in the case of mercury, the year is 88 earth days long, This is a ratio of 3:2 - we refer to this as a resonance since there is a number relationship. As a result of the these two times being close, the time between sunrises on mercury is the rotation on its axis is 59 days long. actually 176 days. As a result of the these two times being close, the time between sunrises on mercury is actually 176 days. Below shows the relation between orbit and rotation on axis to produce 1 day".
