A Compendium of Astronomy: Containing the Elements of the Science, Familiarly Explained and Illustrated |
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A Compendium of Astronomy: Containing the Elements of the Science ... Denison Olmsted No preview available - 2015 |
Common terms and phrases
61 Cygni altitude angle angular appear astronomers atmosphere axis azimuth binary stars called celestial circle clock comet conjunction constellation degree diameter disk distance diurnal revolution double stars earth earth's orbit eclipse equal equator equinox exhibit figure fixed stars force full moon globe gravity greater heavenly bodies heavens hemisphere Hence Herschel horizon hour inferior conjunction inferior planets instrument Jupiter latitude learner light longitude lunar lunar eclipse magnitude measure Mercury meridian miles moon moon's mountains move nearer nearly nebula node oblique observations opposite orbit parallax parallel passing perihelion period planetary pole refraction represent respect revolve right ascension ring satellites Saturn seen shadow side sidereal day solar system space spectator sphere spots sun and moon sun's superior conjunction superior planets supposed surface tail tance telescope tide-wave tides tion transit tropic Uranus velocity Venus visible west to east zenith Zodiac
Popular passages
Page 92 - Newton's Three Laws of Motion," and are as follows: (1) All bodies continue in a state of rest, or of uniform motion in a straight line, unless acted upon by some external force that compels a change.
Page 94 - GRAVITATION, is that influence by which every body in the universe, whether great or small, tends towards every other, with a force which is directly as the quantity of matter, and inversely as the square of the distance.
Page 198 - ... satellites. But we shall do wrong to judge of the fitness or unfitness of their condition from what we see around us, when, perhaps, the. very combinations which convey to our minds only images of horror, may be in reality theatres of the most striking and glorious displays of beneficent contrivance.
Page 274 - IN 1803, Sir William Herschel first determined and announced to the world, that there exist among the stars separate systems, composed of two stars revolving about each other in regular orbits. These he denominated binary stars, to distinguish them from other double stars where no such motion is detected, and whose proximity to each other may possibly arise from casual juxtaposition, or from one being in the range of the other.
Page 138 - As the sun and earth are both situated in the plane of the ecliptic, if the moon also revolved around the earth in this plane, we should have a solar eclipse at every new moon, and a lunar eclipse at every full...