Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 103
he straight line that passes through its centre perpendicular to itsplane. What is the annual motion of this point in longitude? In how many years would itmake the circuit of the ecliptic ? In what way can we form an idea of this motion of theequinoctial points 1 Explain from figure. THE PKECESSION… … PRECESSION EXPLAINED. P1 is always at the same distance from P revolving as itdoes in a circle about P. 148. The following illustration may tend still further FIG. 32
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
