Descriptive Astronomy |
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Page xvii
... orbit as regards the Earth's . - Consequences resulting from their being inclined . -Retrograde motion of the nodes of the Moon's orbit . Coincidence of 223 synodical periods with 19 synodical revo- lutions of the node . - Known as the ...
... orbit as regards the Earth's . - Consequences resulting from their being inclined . -Retrograde motion of the nodes of the Moon's orbit . Coincidence of 223 synodical periods with 19 synodical revo- lutions of the node . - Known as the ...
Page xx
... orbits . -Elements of a Comet's orbit . For a parabolic orbit , 5 in number . - Direction of motion . - Eccentricity of an elliptic orbit . - Early speculations as to the paths Comets moved in . - Comets visible in the day time ...
... orbits . -Elements of a Comet's orbit . For a parabolic orbit , 5 in number . - Direction of motion . - Eccentricity of an elliptic orbit . - Early speculations as to the paths Comets moved in . - Comets visible in the day time ...
Page 28
... orbit . - Curious relation between the distances and the periods of the Planets . - The Ellipse . - Popular ... orbits are within that of the Earth - Vulcan , Mercury , and Venus ; ( 2 ) the superior planets , or those whose orbits are ...
... orbit . - Curious relation between the distances and the periods of the Planets . - The Ellipse . - Popular ... orbits are within that of the Earth - Vulcan , Mercury , and Venus ; ( 2 ) the superior planets , or those whose orbits are ...
Page 30
... orbits are more or less inclined to the ecliptic , and inter- sect it in two points , which are the nodes ; one half of the orbit lying north , and the other south of the Earth's path . 4. They are opaque bodies like the Earth ; and ...
... orbits are more or less inclined to the ecliptic , and inter- sect it in two points , which are the nodes ; one half of the orbit lying north , and the other south of the Earth's path . 4. They are opaque bodies like the Earth ; and ...
Page 31
... orbit of a planet with reference to its form , magnitude , and position , is determined by the five following data ... orbit , as seen from the Sun. - 8 . 3. The inclination of the orbit , or the angle made by the plane of the orbit with ...
... orbit of a planet with reference to its form , magnitude , and position , is determined by the five following data ... orbit , as seen from the Sun. - 8 . 3. The inclination of the orbit , or the angle made by the plane of the orbit with ...
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Common terms and phrases
angle angular apparition April Arago astronomers atmosphere axis bright Cassini Cassiopeia Catalogue centre circle cluster colour comet appeared comet was seen constellation Dawes Decl diameter disc discovered discovery double stars Earl of Rosse Earth eclipse Encke epoch equator equatorial equinox eye-piece globular cluster Halley's comet heavens Herculis Herschel Hind hour Hydræ inches inferior conjunction inferior planets instrument John Herschel July June Jupiter Lassell Leonis light longitude lunar Ma-tuoan-lin Mädler Mailla March Mars mean distance Mercury meridian meteors miles minor planets Month Moon Moon's motion naked eye nebula node object orbit parallax passed perihelion period Phil Pingré planet proper motion refraction remarkable right ascension ring rotation satellites Saturn Schröter Sept shew sidereal solar spots star otherwise called Sun's surface tail telescope Trans transit Uranus Ursa Venus visible weeks ΙΟ
Popular passages
Page 315 - For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God...
Page 314 - So spake the grisly terror ; and in shape, So speaking, and so threatening, grew ten-fold More dreadful and deform : on the other side, Incensed with indignation, Satan stood Unterrified, and like a comet burned, That fires the length of Ophiuchus huge In the Arctic sky, and from his horrid hair Shakes pestilence and war.
Page 452 - In the first month, on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.
Page 66 - While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
Page 31 - The squares of the periodic times of the planets are proportional to the cubes of their mean distances from the sun.
Page 795 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Page 184 - I did not remark any beams projecting from it which deserved notice as much more conspicuous than the others ; but the whole was beamy, radiated in structure, and terminated (though very indefinitely) in a way which reminded me of the ornament frequently placed round a mariner's compass. Its colour was white, or resembling that of Venus.
Page 244 - ... properly adjusted at every instant to that of the ball, while preserving its inclination to the horizon, so that when the ball in its natural descent reached C, the tube should have been carried into the position...
Page 124 - Saturn, perhaps, devoured his children ? Or were the appearances indeed illusion or fraud, with which the glasses have so long deceived me as well as many others to whom I have shown them...