Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 96
tropical year. This is a littleshorter than the sidereal year,owing to the precession ofthe equinoxes. This will beevident from Fig. 96. Thecircle represents the ecliptic,S the sun, and E the vernalequinox. The sun movesaround the eliptic eastward, as indicated by the long arrow,while the equinox… … DAYS. HOURS. MIX. SEC. Sidereal year • 365^5636=365 6 9 9 Tropical year • 365^4220=365 5 48 46 Since the recurrence of the seasons depends on the tropi-cal year, the latter is the one to be used in forming thecalendar and for the purposes of civil life generally. Itstrue length is eleven minutes…
Astronomy
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