An Introduction to Astronomy: Designed as a Textbook for the Use of Students of Yale College
Collins, Keese, & Company, 1839 - 276 pages
In an exploration of black American military heroes from Crispus Attucks to Colin Powell, Buckley presents a history of bravery, valor, patriotism, and extraordinary personal courage both on and off the battlefield. American Patriots is one of the great untold stories in American history. There have been books on individual black soldiers, but this is the first to tell the full story of the black American military experience, starting with the Revolution & culminating with Desert Storm. The best histories are about more than facts & events-they capture the spirit that drives men to better their lives & to demand of themselves the highest form of sacrifice. That spirit permeates Gail Buckley's dramatic, deeply moving, & inspiring book. You'll meet the men who fought in the decisive engagements of the Revolution, the legendary Buffalo Soldiers, & the heroic black regiments of the Civil War. You'll meet some of America's greatest patriots-men who fought in the First & Second World Wars when their country denied them access to equipment & training, segregated the ranks, & did all it could to keep them off the battlefield. You'll meet the heroes of Korea, Vietnam, & Desert Storm. And you'll meet two families, the Lews & the Pierces, who have served in every major American engagement since the Revolution. FDR used to say that Americanism was a matter of the mind & heart, not of race & ancestry. With photographs throughout & dozens of original interviews with veterans, American Patriots is a tribute to the black American men & women who fought & often gave their lives in the service of that ideal.
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Common terms and phrases
altitude amount angle angular appear astronomers attraction axis body calculation called cause celestial circle comet conjunction consequently corresponding course declination described determined diameter direction disk distance earth east ecliptic effect equal equator equinox fact fall figure force give given globe gravity greater greatest heavens Hence horizon hour inclination increase inferior Jupiter known latitude length less light longitude lunar magnitude matter mean measured Mercury meridian method miles month moon moon's motion move namely nearly node observations opposite orbit parallax parallel passes period planet pole portion position present produced radius reaches represent respect revolution revolves right angles right ascension ring satellites seen shadow side similar situated solar sometimes space sphere square stars sun's supposed surface telescope tides tion true turned Venus visible whole zenith
Page 89 - 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 255 - Another, in the constellation Andromeda, presents a visible disk of 12", perfectly defined and round. Granting these objects to be equally distant from us with the stars, their real dimensions must be such as would fill, on the lowest computation, the whole orbit of Uranus. It is no less evident that, if they be solid bodies of a solar nature, the intrinsic splendor of their surfaces must be almost infinitely inferior to that of the sun's.
Page 199 - ... 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 259 - 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 201 - These satellites offer remarkable, and indeed quite unexpected and unexampled peculiarities. Contrary to the unbroken analogy of the whole planetary system, the planes of their orbits are nearly perpendicular to the ecliptic, being inclined no less than 78° 58' to that plane, and in these orbits their motions are retrograde; that is, instead of advancing from west to east around their primary, as is the case with all the other planets and satellites, they move in the opposite direction. With this...
Page 227 - ... of their attraction beyond calculable limits. Under such circumstances, we might have " years of unequal length, and seasons of capricious temperature, planets and moons of portentous size and aspect, glaring and disappearing at uncertain intervals...
Page 195 - Fig. 46. broader and less strongly marked than those of Jupiter, and owing doubtless to a similar cause. That the ring is a solid opake substance, is shown by its throwing its shadow on the body of the planet on the side nearest the sun, and on the other side receiving that of the body.
Page 233 - Their tails consist of matter of such tenuity that the smallest stars are visible through them. They can only be regarded as great masses of thin vapor, susceptible of being penetrated through their whole substance by the sunbeams, and reflecting them alike from their interior parts and from their surfaces.
Page 174 - THIRD LAW. — The squares of the periodical times are as the cubes of the mean distances from the sun. The periodical time of a body is the time it takes to complete its orbit, in its revolution about the sun. Thus the earth's periodic time is one year, and that of the planet Jupiter about twelve years.
Page 256 - This remarkable law of variation appears strongly to suggest the revolution round it of some opaque body, which, when interposed between us and Algol, cuts off a large portion of its light. " It is,