Definition of hour angle
: the angle between the celestial meridian of an observer and the hour circle of a celestial object measured westward from the meridian
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“Hour angle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hour%20angle. Accessed 27 May. 2022.
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Time Traveler for hour angle
The first known use of hour angle was circa 1837
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