- precessional period
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период прецессии
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
Saros cycle — The Saros cycle is an eclipse cycle with a period of about 18 years 11 days 8 hours (approximately 6585⅓ days) that can be used to predict eclipses of the Sun and Moon. One Saros after an eclipse, the Sun, Earth, and Moon return to approximately… … Wikipedia
SS 433 — Artist s impression of SS 433 Observation data Epoch J2000.0 … Wikipedia
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2012 phenomenon — Part of a series on … Wikipedia
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