- astronomical twilight
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The period in which the sun is between 12° - 18° below the horizon in the morning and evening.
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astronomical twilight
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astronomical twilight — astronominė prieblanda statusas T sritis Gynyba atitikmenys: angl. astronomical twilight pranc. crépuscule astronomique ryšiai: platesnis terminas – prieblanda … NATO terminų aiškinamasis žodynas
astronomical twilight — either of two periods of partial darkness, after sunset or before sunrise, when the center of the sun is more than 6° but less than 18° below the horizon. * * * … Universalium
astronomical twilight — The period before sunrise and after sunset when sun’s center is between 12° and 18° below sea level horizon. This may be regarded for all practical purposes as synonymous with complete darkness … Aviation dictionary
astronomical twilight — noun : the period after sunset or before sunrise ending or beginning when the sun is about 18 degrees below the horizon * * * either of two periods of partial darkness, after sunset or before sunrise, when the center of the sun is more than 6°… … Useful english dictionary
TWILIGHT — TWILIGHT, the transition period between day and night, called in the Bible bein ha arbayim (Heb. בֵּין הָעַרְבַּיִם, Ex. 12:6), and in rabbinic literature bein ha shemashot (Heb. בֵּין הַשְּׁמָשׁוֹת, Ber. 2b; Avot 5:9). Whether twilight forms… … Encyclopedia of Judaism
Twilight — For other uses, see Twilight (disambiguation). Twilight at Riga Bridge … Wikipedia
twilight — The period of incomplete darkness following sunset and preceding sunrise. Twilight is designated as civil, nautical, or astronomical, as the darker limit occurs when the center of the sun is 6°, 12°, and 18°, respectively, below the celestial… … Aviation dictionary
civil twilight — noun : the period after sunset or before sunrise ending or beginning when the sun is about 6 degrees below the horizon and during which on clear days there is enough light for ordinary outdoor occupations * * * civil twilight noun (astronomy) The … Useful english dictionary
Prague Astronomical Clock — The clock tower The Prague Astronomical Clock or Prague Orloj (Czech: Pražský orloj [praʃskiː orloj]) is a medieval astronomical clock located in Prague, the capital of the Czech Republic, at … Wikipedia
York Minster astronomical clock — The York Minster astronomical clock was installed in the North Transept of York Minster in 1955. It was first conceived in 1944 and designed by R d E Atkinson, chief assistant at the Royal Greenwich Observatory. The clock is a memorial to the… … Wikipedia
