Fourteen Weeks in Descriptive Astronomy |
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Page 54
... eastern limb ; day by day it progresses , with a grad- ually increasing rapidity , until it reaches the cen- Fig . 7 . 00 CHANGE IN SPOTS AS THEY CROSS THE DISK . tre ; it now gradually loses its rapidity , and finally disappears on the ...
... eastern limb ; day by day it progresses , with a grad- ually increasing rapidity , until it reaches the cen- Fig . 7 . 00 CHANGE IN SPOTS AS THEY CROSS THE DISK . tre ; it now gradually loses its rapidity , and finally disappears on the ...
Page 55
... eastern limb before it reappears a second time . During this time the earth has gone forward in its orbit , so that the location of the observer is changed ; allowing for this , the sun's time of rotation is about twenty- five days ( 25 ...
... eastern limb before it reappears a second time . During this time the earth has gone forward in its orbit , so that the location of the observer is changed ; allowing for this , the sun's time of rotation is about twenty- five days ( 25 ...
Page 75
... ( A ) when it comes between the earth and the sun , and a superior conjunction ( B ) when the sun lies between it and the earth . ( See Fig . 19. ) When the planet attains its greatest distance east or west THE PLANETS . 75.
... ( A ) when it comes between the earth and the sun , and a superior conjunction ( B ) when the sun lies between it and the earth . ( See Fig . 19. ) When the planet attains its greatest distance east or west THE PLANETS . 75.
Page 76
Joel Dorman Steele. When the planet attains its greatest distance east or west ( as we see it ) from the sun , it is ... east of the sun , it sets later than the sun , and hence is " evening star " when west of the sun , it rises earlier ...
Joel Dorman Steele. When the planet attains its greatest distance east or west ( as we see it ) from the sun , it is ... east of the sun , it sets later than the sun , and hence is " evening star " when west of the sun , it rises earlier ...
Page 84
... east , rising higher each morn- ing , until its greatest elevation equals that which it before attained in the west . Thus the planet appears to slowly but steadily oscillate like a pendulum , to and fro from one side to the other of ...
... east , rising higher each morn- ing , until its greatest elevation equals that which it before attained in the west . Thus the planet appears to slowly but steadily oscillate like a pendulum , to and fro from one side to the other of ...
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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