Lunar method

Lunar method
Lunar Lu"nar (l[=u]"n[~e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster]

2. Resembling the moon; orbed. --Dryden. [1913 Webster]

3. Measured by the revolutions of the moon; as, a lunar month. [1913 Webster]

4. Influenced by the moon, as in growth, character, or properties; as, lunar herbs. --Bacon. [1913 Webster]

{Lunar caustic} (Med. Chem.), silver nitrate prepared to be used as a cautery; -- so named because silver was called luna by the ancient alchemists.

{Lunar cycle}. Same as {Metonic cycle}. See under {Cycle}.

{Lunar distance}, the angular distance of the moon from the sun, a star, or a planet, employed for determining longitude by the {lunar method}.

{Lunar method}, the method of finding a ship's longitude by comparing the local time of taking (by means of a sextant or circle) a given lunar distance, with the Greenwich time corresponding to the same distance as ascertained from a nautical almanac, the difference of these times being the longitude.

{Lunar month}. See {Month}.

{Lunar observation}, an observation of a lunar distance by means of a sextant or circle, with the altitudes of the bodies, and the time, for the purpose of computing the longitude.

{Lunar tables}. (a) (Astron.) Tables of the moon's motions, arranged for computing the moon's true place at any time past or future. (b) (Navigation) Tables for correcting an observed lunar distance on account of refraction and parallax.

{Lunar year}, the period of twelve lunar months, or 354 days, 8 hours, 48 minutes, and 34.38 seconds. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Lunar — Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the revolutions… …   The Collaborative International Dictionary of English

  • Lunar caustic — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar cycle — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar distance — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar month — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar observation — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar tables — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar year — Lunar Lu nar (l[=u] n[ e]r), a. [L. lunaris, fr. luna the moon. See {Luna}, and cf. {Lunary}.] 1. Of or pertaining to the moon; as, lunar observations. [1913 Webster] 2. Resembling the moon; orbed. Dryden. [1913 Webster] 3. Measured by the… …   The Collaborative International Dictionary of English

  • Lunar distance (navigation) — For the history of the lunar distance method, see History of longitude. Finding Greenwich time while at sea using a lunar distance. The Lunar Distance is the angle between the Moon and a star (or the Sun). The altitudes of the two bodies are used …   Wikipedia

  • Lunar orbit rendezvous — (LOR) was the method used by the Apollo missions for human spaceflight to the Moon. In an LOR mission a main spacecraft and a smaller lunar module travel together into lunar orbit (orbit around the Moon). The lunar module then independently… …   Wikipedia

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