A Fourteen Weeks Course in Descriptive Astronomy

angle aphelion appear astronomer atmosphere attraction axis beautiful bright brilliant called Capricornus Celestial Sphere centre circle color comet conjunction constellation Cor Caroli dark Davies diameter disk double star earth ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light longitude luminous lunar magnitude Mars mean distance measured Mercury meridian meteors miles moon moon's motion move Mythological naked eye nearer nearly nebula Neptune night node north pole observer opposite orbit parallax pass path penumbra perigee perihelion planet polar portion position rays represented revolution revolve Right Ascension ring rotation Saturn seasons seen shadow shine side sidereal solar system southern space spots summer sun's superior planets supposed surface tance telescope theory tion Uranus varies velocity Venus vernal equinox visible zodiac