Nutation

Definition and stakes

Portrait of George Biddell Airy George Biddell Airy,  Popular Astronomy: A Series of Lectures Delivered at Ipswich (1881)

“ I have here spoken repeatedly of our supposition that some stars are nearer to us than others. The grounds of this supposition are generally the amount of what is called the proper motion of the stars. Upon comparing the places of the stars, as we observe them in different years, and applying the corrections for precession, nutation, and aberration, so as to reduce every observation of every star to what it ought to exhibit on the first day in the year, agreeably to the common practice of astronomers, we find that a great number of the stars have what is called proper motion. ”
Source: Wikisource

R. L. Garner,  The Speech of Monkeys

“ It has impressed me with the thought that all our senses are like the strings of some great [Pg 68] harp, each one having a certain tension; so that any sound produced through an emotion would find response in that chord which is in unison with it. Indeed, I have thought that our emotions and sensations may be like the diatonic scale in music, and that the organs through which they act may respond in tones and semitones, and that each multiple of any fundamental tone will affect the chord in unison with it, like the strings upon a musical instrument. ”
Source: Gutenberg

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