Eight Familiar Lectures on Astronomy, Intended as an Introduction to the Science...W. Phillips, 1817 - 254 pages |
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Page 22
... divided into the same number of equal parts ; and every circle was long since divided into 360 equal parts or degrees , and each of these degrees into 60 parts called minutes ; each minute into 60 parts called seconds , and so on . The ...
... divided into the same number of equal parts ; and every circle was long since divided into 360 equal parts or degrees , and each of these degrees into 60 parts called minutes ; each minute into 60 parts called seconds , and so on . The ...
Page 24
... . And further , it will be seen , when we come to treat on the Fixed stars , that the whole sphere is so divided and subdivided in every direction , by imaginary circles passing over and between particular stars , that their 24.
... . And further , it will be seen , when we come to treat on the Fixed stars , that the whole sphere is so divided and subdivided in every direction , by imaginary circles passing over and between particular stars , that their 24.
Page 41
... divided into 6 equal areas or portions , and supposing a planet to be 12 months in moving round the whole orbit , each of these divisions will be passed through in two months . Hence , as each division differs from that next to it , the ...
... divided into 6 equal areas or portions , and supposing a planet to be 12 months in moving round the whole orbit , each of these divisions will be passed through in two months . Hence , as each division differs from that next to it , the ...
Page 56
... divided by 113 , for the reasons above given , we obtain the circumference of his orbit in miles ; this , divided by the number of hours in his year , gives the mean rate of his travelling every hour . This rule is applicable to all the ...
... divided by 113 , for the reasons above given , we obtain the circumference of his orbit in miles ; this , divided by the number of hours in his year , gives the mean rate of his travelling every hour . This rule is applicable to all the ...
Page 97
... divided into 360 parts , its divi- sions will be equal to each other all around it . If there- fore the Earth were a perfect sphere , the degrees all around it would be equal to each other . But if it be somewhat flattened at the poles ...
... divided into 360 parts , its divi- sions will be equal to each other all around it . If there- fore the Earth were a perfect sphere , the degrees all around it would be equal to each other . But if it be somewhat flattened at the poles ...
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Eight Familiar Lectures on Astronomy, Intended as an Introduction to the Science William Philipps No preview available - 2019 |
Common terms and phrases
24 hours aberration of light angle apparent diameter astronomer atmosphere attraction axis calculated cause celestial bodies Ceres circle clock Comet constellations Crab diagram disk divided Earth Earth moves Earth round Earth's orbit eclipse Epact equal equator equinox fixed stars Georgium Sidus globe greater half happen hence Herschel horizon inclination inhabitants Jupiter less light and heat luminous lunation Mercury meridian miles an hour millions of miles minutes Moon's motion move round nearer nearly Newton node north pole observed opposite orbit oval owing parallax pass path period planetary planets pole star precisely quarter refractive represent revolution revolve round the Earth round the Sun Saturn seconds seen shadow shew shewn side Solar spots starry sphere Sun appears Sun's rays surface telescope termed tides tion transit of Venus tropic of Cancer turned velocity Venus vernal equinox Vesta visible whole Zodiac Zodiacal light
Popular passages
Page 159 - ... a degree of brightness about as strong as that with which such a coal would be seen to glow in faint daylight.
Page 250 - And this our life, exempt from public haunt, Finds tongues in trees, books in running brooks, Sermons in stones, and good in everything.
Page 159 - Hence we may compute that the shining or burning matter must be above three miles in diameter. It is of an irregular round figure, and very sharply defined on the edges. The other two...
Page 158 - April 19, 10h 36", sidereal time. I perceive (says he) three volcanoes in different places of the dark part of the new moon. Two of them are either already nearly extinct, or otherwise in a state of going to break out; which perhaps may be decided next lunation. The third shows an actual eruption of fire or luminous matter.
Page 155 - ... 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 every moment that they are to be torn from their base, and that the process of destructive separation which we had only contemplated...
Page 97 - The common names, or meaning of these words, in the same order, are, the Ram, the Bull, the Twins, the Crab, the Lion, the Virgin, the Scales, the Scorpion, the Archer, the Goat, the Waterer, and the Fishes. Fig. 183. The 12 signs of the zodiac, together with the sun, and the earth revolving around him, are represented at fig.
Page 39 - The same astronomer also ascertained, that the squares of the times of revolution of the different planets are in proportion to the cubes of their mean distances from the sun.
Page 130 - The space between the Tropic of Cancer and the Arctic Circle is called the North Temperate Zone, and that between the Tropic of Capricorn and the Antarctic Circle is the South Temperate Zone.
Page 234 - Those which appear largest, are called stars of the first magnitude ; the next to them in lustre, stars of the second magnitude ; and so on to the sixth, which are the smallest that are visible to the bare eye.
Page 159 - The other two volcanoes are much farther towards the centre of the moon, and resemble large, pretty faint nebulae, that are gradually much brighter in the middle ; but no well defined luminous spot can be discerned in them. These three spots are plainly to be distinguished from the rest of the marks upon the moon ; for the reflection of the sun's rays from the earth is, in its present situation, sufficiently bright, with a...