Astronomy, as it is Known at the Present Day: With an Account of the Nature and Use of Astronomical Instruments, the Manner of Calculating the Notes of the Calendar, the Distances and Magnitudes of the Planets, and a Number of Other Useful and Interesting Calculations in AstronomyW. Cole, 1825 - 166 страница |
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Страница 9
... meridian altitude is the altitude when it is on the meridian . 25. The Parallax of any celestial object is the difference of its angular position as it would be seen from the centre of the earth , and as it is seen from a point on the ...
... meridian altitude is the altitude when it is on the meridian . 25. The Parallax of any celestial object is the difference of its angular position as it would be seen from the centre of the earth , and as it is seen from a point on the ...
Страница 26
... meridian . + Heraclitus imagined the earth to have the shape of a canoe ; Anaximander supposed it to be cylindrical ; and Aristotle , the great oracle of antiquity , gave it the form of a timbrel . A very little reflection , however ...
... meridian . + Heraclitus imagined the earth to have the shape of a canoe ; Anaximander supposed it to be cylindrical ; and Aristotle , the great oracle of antiquity , gave it the form of a timbrel . A very little reflection , however ...
Страница 29
... meridian circle on the earth's surface . The earliest attempt of this kind of which we have any account , is that of Eratosthenes of Alexandria , in Egypt . By measuring the sun's distance from the zenith of Alexandria , on the ...
... meridian circle on the earth's surface . The earliest attempt of this kind of which we have any account , is that of Eratosthenes of Alexandria , in Egypt . By measuring the sun's distance from the zenith of Alexandria , on the ...
Страница 30
... meridian is found to be 24,855-84 English miles . The circumference of the equator is 24,896 · 16 miles , which is about 40 miles greater than the preceding . The mean dia- meter of the earth is therefore 7910 nearly , and the length of ...
... meridian is found to be 24,855-84 English miles . The circumference of the equator is 24,896 · 16 miles , which is about 40 miles greater than the preceding . The mean dia- meter of the earth is therefore 7910 nearly , and the length of ...
Страница 32
... meridian at midnight . His retrograde motion is then swift- est ; it afterwards becomes gradually slower , and ceases altogether when the planet has again come to be about 137 ° distant from the sun on the other side . The motion then ...
... meridian at midnight . His retrograde motion is then swift- est ; it afterwards becomes gradually slower , and ceases altogether when the planet has again come to be about 137 ° distant from the sun on the other side . The motion then ...
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Astronomy, as It Is Known at the Present Day (Classic Reprint) George G. Carey Приказ није доступан - 2018 |
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altitude angle appear ascertained astronomers atmosphere Aurora Borealis axis calculations called centre circle clouds colours Comets constellation degrees density diameter direction disc discovered diurnal motion Dominical letter earth's orbit eccentric anomaly eclipse equal equator equinox fixed stars following figure glass globe gravity greater greatest heat heavenly bodies heavens height Hence Herschel horizon inferior conjunction Julius Cæsar Jupiter known latitude length light longitude luminous lunar magnitude mean distance Mercury meridian miles minutes moon moon's move nearly night object obliquity observed occasioned opposite parallax passing period phenomena philosophers poles produced Ptolemy quantity of matter rainbow rays refraction retrograde motion revolution round revolve right ascension rise round the earth round the sun satellites Saturn seen shadow shines sidereal solar spherical sun and moon sun's supposed surface telescope tides tion Tycho Tychonic systems Uranus velocity Venus visible
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