Astronomy, as it is known at the present day: with an account of the nature and use of astronomical instruments, the manner of calculating the notes of the calendar, the distances and magnitudes of the planets and a number of other useful and interesting calculations in astronomy. [With a supplement.]William Cole, 1825 - 234 من الصفحات |
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altitude angle appear ascertained astronomers atmosphere Aurora Borealis axis calculations called centre circle clouds colours Comets constellation degrees density diameter direction disc discovered diurnal diurnal motion Dominical letter earth's orbit eccentric anomaly eclipse equal equator equinox fixed stars following figure glass globe gravity greater greatest heat heavenly bodies heavens height Hence Herschel horizon inferior conjunction Julius Cæsar Jupiter known latitude laws of Kepler length light longitude luminous lunar magnitude mean anomaly mean distance Mercury meridian miles minutes moon moon's motion move nearly night object observed occasioned opposite parallax passing period phenomena poles produced quantity of matter rainbow rays refraction retrograde motion revolution round revolve right ascension rise round the earth round the sun satellites Saturn seen shadow shines sidereal solar spherical sun and moon sun's supposed surface telescope tides tion Uranus velocity Venus visible