ASTR-1010 Lecture Notes - Lecture 3: Universal Time, Solar Time, Orbital Period
6 Sep 2016
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Document Summary
Sidereal day earth rotates once every 23 hours, 56 minutes, and 4. 07 seconds. Sidereal day time it takes any star to make a circuit of the local sky. Solar day sun makes one circuit around the local sky a day which takes 24 hours. Measures the time it takes the sun to be at its highest point one day and how long it takes to reach that point the next day. The earth moves 1 degree in its orbit each day which makes the solar day 1/360 longer than a sidereal day. Earth rotates 361 degrees around itself each day. 1 d = 1d x 360 degree / 365 = 1 degree. 1 degree = 1/360 x 24 x 60 = 4 min. Sidereal day earth to spin once with respect to stars. Solar day earth to spin once with respect to the sun.
