A Compendium of Astronomy: Intended to Simplify and Illustrate the Principles of the Science, and Give a Concise View of the Motions and Aspects of the Great Heavenly Luminaries ; Adapted to the Use of Common Schools, as Well as Higher SeminariesCarter, Hendee & Company, 1834 - 184 pages |
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Page 49
... presents the same face to the Earth . Hence in the same time that it performs a revolution , it must re- volve on its axis ; unless the different sides of the Moon present the same prospect . That there should be a uni- formity of ...
... presents the same face to the Earth . Hence in the same time that it performs a revolution , it must re- volve on its axis ; unless the different sides of the Moon present the same prospect . That there should be a uni- formity of ...
Page 50
... presents the mountain at d . When the Moon returns to A , the mountain must come round to a again . Thus , in a sidereal revolution , 27 d . 7 h . 43 m . 12 s . the Moon must have revolved once on its axis , or the same side cannot be ...
... presents the mountain at d . When the Moon returns to A , the mountain must come round to a again . Thus , in a sidereal revolution , 27 d . 7 h . 43 m . 12 s . the Moon must have revolved once on its axis , or the same side cannot be ...
Page 53
... present an inaccessible barrier to the north- east , while in the south - west , they sink in gentle declivi- ty to the plains . In The analogy between the surface of the Earth and Moon fails in a still more remarkable degree , when we ...
... present an inaccessible barrier to the north- east , while in the south - west , they sink in gentle declivi- ty to the plains . In The analogy between the surface of the Earth and Moon fails in a still more remarkable degree , when we ...
Page 57
... present the same face to us ? What may cause the Moon to turn on its axis ? What has been the error of authors re- specting the time of the Moon's revolution on its axis ? What is the diameter of the Moon ? How must the Earth appear to ...
... present the same face to us ? What may cause the Moon to turn on its axis ? What has been the error of authors re- specting the time of the Moon's revolution on its axis ? What is the diameter of the Moon ? How must the Earth appear to ...
Page 59
... presents a singular appearance , apparently projecting beyond the disk of the planet , and producing a breach which seems the greater on account of the gibbous appearance of the planet . Other astronomers have observed a peculiar ...
... presents a singular appearance , apparently projecting beyond the disk of the planet , and producing a breach which seems the greater on account of the gibbous appearance of the planet . Other astronomers have observed a peculiar ...
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A Compendium of Astronomy; Intended to Simplify and Illustrate the ... John Vose No preview available - 2011 |
Common terms and phrases
ancient angle aphelion appear Aries ascending node Asteroids astronomers atmosphere attraction aurora borealis axis bissextile brazen meridian cause celestial centre comets commence computed conjunction constellations declination degree discovered disk diurnal rotation dominical letter east eclipses elevated epact equal equator equinox fixed stars full Moon harvest Moon heat heavenly body heavens hemisphere Herschel horizon hour inclination inferior conjunction inferior planets inhabitants Jupiter latitude libration light longitude longitude for 100 luminous lunar magnitude Mars Mean diameter Mean distance Mercury and Venus meridian meteors miles month move night obliquity observed opposite parallax passing performs a revolution perihelion phenomena Plate polar circles poles primary planets rays reckoned refraction represented Retrograde motion revolve right ascension rising round the Earth round the Sun satellites Saturn seen side slow of clock solar system spots Sun fast Sun slow Sun's place surface telescope tides tion visible zenith
Popular passages
Page 156 - our astronomical observer" at a salary of £100 per annum, his duty being "forthwith to apply himself with the most exact care and diligence to the rectifying the tables of the motions of the heavens and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting the art of navigation.
Page 169 - I was called up," says Mr. Ellicou, " about 3 o'clock in the morning, to see the shooting stars, as they are called. The phenomenon was grand and awful. The whole heavens appeared as if illuminated with skyrockets, which disappeared only by the light of the sun, after daybreak. The meteors, which at any one instant of time, appeared as numerous as the stars, flew in all possible directions...
Page 158 - ... that, situated as we are in this western hemisphere, more than three thousand miles from any fixed or known meridian, it would be proper, in a national point of view to establish a first meridian for ourselves ; and that measures should be taken for the eventual establishment of such a meridian in the United States. In examining the maps and charts of the United States, and the particular states, or their sea coasts, which have been published in this country, the committee find, that the publishers...
Page 128 - AG F E D CB A G F ED C B A 1100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24...
Page 124 - Thirty days hath September, April, June, and November, All the rest have thirty-one Excepting February alone : Which hath but twenty-eight, in fine, Till leap year gives it twenty-nine.
Page 147 - That the milky way is a most extensive stratum of stars of various sizes admits no longer of the least doubt; and that our sun is actually one of the heavenly bodies belonging to it is as evident.
Page 168 - Towards the morning of the 13th of November, 1799, we witnessed a most extraordinary scene of shooting meteors. Thousands of bodies and falling stars succeeded each other during four hours. Their direction was very regular from north to south. From the beginning of the phenomenon there was not a space in the firmament equal in extent to three diameters of the moon which was not filled every instant with bodies or falling stars. All the meteors left luminous traces or phosphorescent bands behind them,...
Page 53 - Huge massess of rock rise at once from the plains, and raise their peaked summits to an immense height in the air, while projecting crags spring from their rugged flanks and threatening the valleys below, seem to bid defiance to the laws of gravitation. Around the base of these frightful eminences are strewed numerous loose and unconnected fragments, which time seems to have detached from their parent mass ; and when we examine the rents and ravines which accompany the over.hanging cliffs, we expect...
Page 81 - The atmosphere is known to abound with electric matter, and the appearance of the electric matter in vacuo is exactly like the appearance of the aurora borealis, which, from its great altitude, may be considered to be in as perfect a vacuum as we can make. The electric matter in vacuo suffers the rays of light to pass through, without being affected by them. The tail of a comet does not expand itself sideways, nor does the electric matter. Hence, he supposes the tails of comets, the aurora borealis,...
Page 72 - ... the heavens that presents us with such a variety of extraordinary phenomena as the planet Saturn : a magnificent globe, encompassed by a stupendous double ring : attended by seven satellites : ornamented with equatorial belts : compressed at the poles : turning...