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Atlas Coelestis, 1729 - 1729 - Meeteek. Home - Astronomie-rara. Constellations of Words. Star-names and their meanings : Allen, Richard Hinckley, 1838-1908. The United States Naval Observatory Library. Moraine, добро пожаловать! — Последний довод королей. History of Constellation and Star Names. Episodic Survey of the History of the Constellations The illustrations on this page have been compiled from a variety of sources.

History of Constellation and Star Names

They are reproduced in accord with 'fair use' provisions unless copyright is otherwise noted. Constellations anciennes disparues. Ch3 alignements planetaires. Jusatocc. Occultation of Saturn by Jupiter are very rare events to be seen from Earth.

Jusatocc

Their average frequency is about one in 4000 years, and our present epoch is particularly "empty" of them. None has ever happened during historical times and the next one will be in y 7541. But if mankind will not be extinct (and I won't bet ten cents on that) people will have the extraordinary opportunity to see two such occultations in the same year! Something which is probably not going to happen again in a million years or so!... Les Prochains Evénements rares. Le chaos dans le système solaire. Astro.uni-bonn. Glorious events that already happened Where: Area(s) of best visibility Next: In how many years does the same or a similar event take place?

astro.uni-bonn

References: Key web links or other references Also check M. Peuschel's event listings! The listed events are mostly alignments, conjunctions, transits, occultations and eclipses, involving two or more solar system bodies - and they are so rare that they happen on average less than once per decade. Chapter 1: PREDICTABLE PERIODIC EVENTS-PART I. A.

Chapter 1: PREDICTABLE PERIODIC EVENTS-PART I

Day Earth's sidereal day 23 Hours 56 minutes 4.091 seconds This interval is responsible for the stars rising about four minutes earlier each day. Planetary Orbital Elements. Legend: " arcseconds Cy Julian century a semi-major axis e eccentricity i inclination Omega longitude of the ascending node ~omega longitude of perihelion L mean longitude Notes: This table contains mean orbit solutions from a 250 yr. least squares fit of the DE 200 planetary ephemeris to a Keplerian orbit where each element is allowed to vary linearly with time.

Planetary Orbital Elements

This solution fits the terrestrial planet orbits to ~25" or better, but achieves only ~600" for Saturn.