Lexell Comet

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Lexell Comet

a bright comet discovered by the French astronomer C. Messier in 1770. It was the first known short-period comet and was named in honor of A. J. Lexell (A. I. Leksel’), who calculated its orbit. The considerable variations in its orbit during close approaches to Jupiter in 1767 and 1779 explain why the Lexell comet was not observed before or after 1770. Since the comet’s close approach to the earth in 1770 did not cause noticeable variations in the earth’s motion, P. Laplace concluded that the comet’s mass was less than 1/5,000 the mass of the earth.

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No references found			Lewis, Oscar Lewis, Reginald F. Lewis, Sinclair Lewis, Sir Arthur Lewis, Sir George Cornewall Lewis, W. Arthur Lewis, Warren K. Lewis, Wyndham Lewis-Matheson method Lewis-Rayleigh afterglow Lewisham lewising tool Lewisite Lewisohn, Ludwig Lewiston lewistonite Lewistown Lewisville LeWitt, Sol Lewontin, Richard C. Lewotobi Lex Lex Ogulnia Lexa, František Lexa, Frantisek Lexell Comet Lexell's Comet Lexell, Anders Jean Lexeme lexer LexiBot lexical analyser lexical analysis Lexical Meaning lexical scope lexical scoping Lexicalization lexicographer lexicographic order lexicographic sort Lexicography Lexicology Lexicon Lexington Lexington and Concord Lexington and Concord, Battles Lexington and Concord, battles of Lexington County Lexington-Fayette County lexiphage Lexis, Wilhelm			Lex prospicit Lex punit mendacium Lex Regni apud Scotos Lex rejicit superflua Lex reprobat moram Lex Ripuaria Lex Romana Lex Salica Lex Salica Lex sanguinis lex scripta Lex semper dabit remedium Lex semper intendit quod convenit ratione Lex soli Lex solis Lex spectat naturae ordinem Lex succurit ignoranti Lex Talionis Lex Talionis Lex terae Lex uno ore omnes alloquitur Lex-Ham Community Band Lexa, František Lexa, Frantisek Lexan Lexan Lexapro Lexell Comet Lexell's Comet Lexell, Anders Jean lexeme lexeme Lexeme-Morpheme Base Morphology Lexemes Lexemes LExEN Lexenburg Lexenburg Lexer LexiBot lexica lexica Lexica Societatis Fenno Ugricae lexical lexical Lexical access Lexical access Lexical Access from Spectra lexical ambiguity Lexical analyser Lexical analysis Lexical analysis Lexical analyzer Lexical category Lexical category Lexical Conceptual Structure lexical database Lexical decision task

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