Answer:

Earth's Rotation

Earth's Rotation and the Apparent Daily Motion of the Sky

The earth rotates about an imaginary LINE that passes through the North and South Poles of the planet. This line is called the AXIS of rotation. Earth rotates about this axis once each day (approximately 24 hours). Although you most likely already knew that FACT, there is a slight complication most people are not aware of.

More specifically, our rotation period (the time elapsed for one rotation) with respect to the stars is called a sidereal day. A sidereal day is 24 sidereal hours, or 23 hours and 56 minutes on a normal clock. Our clock time is based on the earth's rotation with respect to the sun from SOLAR noon to solar noon. This is a solar day, and it is divided into 24 hours. Because Earth travels about 1 / 365 of the way around the sun during one day, there is a small difference between solar time and sidereal time.

The earth takes about 1/365 of a day or about 4 minutes more to get into the same

position with respect to the sun after it reaches the same position with respect to the stars. We use sun-based time because it is more important to most of us whether the Sun is up than whether a given star is up. Those who care which star is up (like astronomers) may also use sidereal time.

1) The sidereal day is shorter than the solar day because the earth rotates and revolves in the same SENSE - counterclockwise in the diagram above. Venus rotates in the opposite direction to its revolution - is its sidereal day longer or shorter than its solar day

Explanation:

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