File:A high-school astronomy- in which the descriptive, physical, and practical are combined (1859) (14577470150).jpg

Identifier: highschoolastro00matt (find matches)
Title: A high-school astronomy: in which the descriptive, physical, and practical are combined ..
Year: 1859 (1850s)
Authors: Mattison, Hiram, 1811-1868
Subjects: Astronomy
Publisher: New York, Mason brothers
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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t the con-jectures of a sagacious mind, not possessed of the evidence requisite to give stability toits opinions. Pythagoras is said to have perished from hunger, in his old age. 6. Who were the first astronomers ? How led to this study ? 7. Who first regular teacher of this science ? How early ? Who next ?—and when ? What correct notions did he seem to entertain ? (For what elsedistinguished ?) 8. Who next after Anaximander ? What advances did he make in thisstudy f (What does Smyth say of his teachings ? What said of his death ?) 12 ASTRONOMY. 9. Ptolemy, an Egyptian philosopher, taught astronomyin the second century of the Christian era. He adoptedthe theory that the earth was located in the center of theuniverse, that it was perfectly at rest, and that the sun,moon, and stars actually revolved around it, from east towest, as they appear to do, every twenty-four hours. Thissystem is called, after its author, the Ptolemaic Theory\ PTOLEMAIC THEORY OF THE STRUCTURE OF THE UNIVERSE.
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1. Ptolemy supposed the earth to he in the center of a system of crystalline arches,or hollow spheres, arranged one within the other, as represented in the cut. It is thoughtby some that he understood the spherical figure of the earth, and the cut is constructedupon this supposition. Ptolemy farther supposed that the sun, moon, and stars werefixed in these crystalline spheres, at different distances from our globe; that the Moonwas in the first, Mercury in the second, Venus in the third? the Sun in the fourth, Mars, 9. Who was Ptolemy ?—and when did he flourish ? Describe his theory,(How locate sun, moon, &c, ? What absurdity did it involve, as it respects COPERNICAN SYSTEM. 13 Jupiter, and Saturn in the next three, and the fixed stars in the eighth. The aneientshad no knowledge of Uranus or Neptune. This ponderous machinery was supposed torevolve from east to west around the earth, carrying with it the sunj moon, and stars,every twenty-four hours; and the spheres being crystal,highschoolastro00matt

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