Fourteen Weeks in Descriptive Astronomy |
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Page 105
... Polaris would be directly overhead , and the stars would seem to pass around us in circles parallel to the horizon , and increasing in diameter from the upper to lower ones . Were we placed at the equator 5 * THE EARTH . 105.
... Polaris would be directly overhead , and the stars would seem to pass around us in circles parallel to the horizon , and increasing in diameter from the upper to lower ones . Were we placed at the equator 5 * THE EARTH . 105.
Page 106
... diameter , north and south from those in the zenith , while we could see one half of the path of each star . Were we placed in the southern hemisphere , the circumpolar stars would rotate about the south pole , and the others in cir ...
... diameter , north and south from those in the zenith , while we could see one half of the path of each star . Were we placed in the southern hemisphere , the circumpolar stars would rotate about the south pole , and the others in cir ...
Page 121
... diameter . To illustrate this , in the cut we suppose that after a series of years the position of the earth's equator has changed from eƒh to g Kl . The inclination of the axis of the earth , CP , to CQ , the pole of the ecliptic ...
... diameter . To illustrate this , in the cut we suppose that after a series of years the position of the earth's equator has changed from eƒh to g Kl . The inclination of the axis of the earth , CP , to CQ , the pole of the ecliptic ...
Page 125
... diameter . Precession illustrated in the spinning of a top . - This motion of the earth's axis is most singularly illus- trated in the spinning Fig . 34 . of a top , and the more remarkably because there the forces are of an opposite ...
... diameter . Precession illustrated in the spinning of a top . - This motion of the earth's axis is most singularly illus- trated in the spinning Fig . 34 . of a top , and the more remarkably because there the forces are of an opposite ...
Page 132
... diameter of both the sun and moon being rather less than 33 ' , it follows that when we see the lower edge of either of these lumina- ries apparently just touching the horizon , in reality the whole disk is completely below it , and ...
... diameter of both the sun and moon being rather less than 33 ' , it follows that when we see the lower edge of either of these lumina- ries apparently just touching the horizon , in reality the whole disk is completely below it , and ...
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Common terms and phrases
ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac