Fourteen Weeks in Descriptive Astronomy |
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Page 27
... found that when at its perihelion ( point nearest the sun ) it moves the fastest , but when at its aphelion ( point furthest from the sun ) it moves the slowest . Once more he " hunted down " various hypotheses , until HISTORY . 27.
... found that when at its perihelion ( point nearest the sun ) it moves the fastest , but when at its aphelion ( point furthest from the sun ) it moves the slowest . Once more he " hunted down " various hypotheses , until HISTORY . 27.
Page 46
... perihelion . As we attempt to locate the heavenly bodies in space , we are immediately startled by the enormous figures employed . The first number , 91,500,000 miles , is far beyond our grasp . Let us try to comprehend it . If there ...
... perihelion . As we attempt to locate the heavenly bodies in space , we are immediately startled by the enormous figures employed . The first number , 91,500,000 miles , is far beyond our grasp . Let us try to comprehend it . If there ...
Page 48
... perihelion ( January ) by 1072 . DIMENSIONS . - Its diameter is about 850,000 miles . * Let us try to understand this amount by comparison . A mountain upon the surface of the sun , to bear the same proportion to the globe itself as the ...
... perihelion ( January ) by 1072 . DIMENSIONS . - Its diameter is about 850,000 miles . * Let us try to understand this amount by comparison . A mountain upon the surface of the sun , to bear the same proportion to the globe itself as the ...
Page 67
... perihelion , and slowest in aphelion . COMPARISON OF THE TWO GROUPS OF THE MAJOR PLANETS . ( Chambers . ) - Separating the major plan- ets into two groups , if we take Mercury , Venus , the Earth , and Mars as belonging to the interior ...
... perihelion , and slowest in aphelion . COMPARISON OF THE TWO GROUPS OF THE MAJOR PLANETS . ( Chambers . ) - Separating the major plan- ets into two groups , if we take Mercury , Venus , the Earth , and Mars as belonging to the interior ...
Page 68
... perihelion distance ; the greatest distance , SC , the aphelion distance . Fig . 14 . S D AN ELLIPSE . CHARACTERISTICS OF PLANETARY ORBIT . — It will not be difficult to follow in the mind the additional Fig . 15 . PLANETARY ORBITS ...
... perihelion distance ; the greatest distance , SC , the aphelion distance . Fig . 14 . S D AN ELLIPSE . CHARACTERISTICS OF PLANETARY ORBIT . — It will not be difficult to follow in the mind the additional Fig . 15 . PLANETARY ORBITS ...
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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