## Smart answer:

# Your search for *′What is hour angle′* returned the following results:

### the angle between two planes

The hour angle of a point is the angle between two planes: one containing the Earth's axis and the zenith (the meridian plane), and the other containing the Earth's axis and the given point (the hour circle passing through the point).

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### one of the coordinates used in the equatorial coordinate system to give the direction of a point on the celestial sphere

In astronomy and celestial navigation, the hour angle is one of the coordinates used in the equatorial coordinate system to give the direction of a point on the celestial sphere.

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### the local solar time (LST)

The Hour Angle converts the local solar time (LST) into the number of degrees which the sun moves across the sky.

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### into the number of degrees which the sun moves across the sky

The Hour Angle converts the local solar time (LST) into the number of degrees which the sun moves across the sky.

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### 1 turn/24 or 15°

1 Hour angle is 1 turn/24 or 15°.

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### the angle, taken to be positive to the west

Hour angle is the angle, taken to be positive to the west, measured along the celestial equator between an observer’s meridian and the hour circle on which some celestial point or object lies.

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### a measurement between 0° and 360°

Sidereal hour angle is a measurement between 0° and 360°, indicating how far west a body is from an arbitrarily chosen point on the celestial sphere called the First Point of Aries.

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### a musical performance generated by the movement of the sun

Hour Angle is a musical performance generated by the movement of the sun.

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### as the difference between noon and the desired time of the day

The hour angle is defined as the difference between noon and the desired time of the day.

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### The variation in longitude amid a spot of attention and

The variation in longitude amid a spot of attention and that of the unswerving stellar ray is described by the hour angle (h).

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### the angle between a fixed point of reference and a point on the globe, measured East or West

The hour angle is the angle between a fixed point of reference and a point on the globe, measured East or West.

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### the angular displacement of the sun east or west of the local meridian due to rotation of the earth on the earth's axis at 15° per hour with morning being negative and afternoon being positive

: The hour angle is the angular displacement of the sun east or west of the local meridian due to rotation of the earth on the earth's axis at 15° per hour with morning being negative and afternoon being positive.

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### in hours,

Like the hour angle, the hour angle is measured in hours, minutes, seconds or decimal hours.

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