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physical phenomena > event > celestial event > periodic celestial event > location dependent periodic celestial event > astronomical horizon event > moonset

moonset comparison table

Subject	has definition	is a kind of	is an instance of	has antonym
astronomical horizon event	The time and azimuth at which a celestial body crosses the astronomical horizon of an oberver.	location dependent periodic celestial event
moonset	The times at which the apparent upper limb of the Moon is on the astronomical horizon just as it sets; i.e., when the true zenith distance, referred to the center of the Earth, of the central point of the disk is 90°34' + s - π, where s is the Moon's semidiameter, π is the horizontal parallax, and 34' is the adopted value of horizontal refraction.		astronomical horizon event	moonrise

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