bk. I. Of the apparent motion of the heavenly bodiesPrinted at the University Press for Longman, Rees, Orme, Brown, and Green, 1830 - Astronomy |
Common terms and phrases
angle angular apparent diameter appears astronomical atmosphere axes axis of rotation bodies celestial centre of gravity CHAP circle circle of latitude comet commencement consequently coordinates curve degrees density described determined diminishes direction disk diurnal motion duration earth ecliptic equal equator equilibrium equinox extremely fixed point fluid greatest height hence horizon hypothesis inclination increase inequalities instant interval Jupiter latitude length light longitude lunar maximum mean distance measures Mercury meridian molecule moon move nearly node observed obtain orbit oscillations parallax parallel pass pendulum perihelion perpendicular phenomena plane pole position preceding proper motion proportional quantity radius vector ratio rays refraction respect resultant retrograde retrograde motion revolution revolve right ascension right line satellites Saturn sidereal sine solar solstice square supposed surface syzygies tangent temperature terrestrial tion Uranus vanishes variations velocity Venus vernal equinox vertical vis viva Ση