Fourteen Weeks in Descriptive Astronomy |
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Page 9
... miles , but vary in the amount . Thus , Newcomb makes the solar paral- lax 8.848 , and the mean solar distance 92,393,000 miles ; while Airy considers the former to be not far from 8'.76 , and the latter 93,300,000 . Mr. Tod , of the ...
... miles , but vary in the amount . Thus , Newcomb makes the solar paral- lax 8.848 , and the mean solar distance 92,393,000 miles ; while Airy considers the former to be not far from 8'.76 , and the latter 93,300,000 . Mr. Tod , of the ...
Page 33
... miles from the surface of the earth , or eight thousand miles from the centre . Then , as it is twice as far from the centre , its weight will be diminished 22 , or 4 times . If it were placed 3 , 4 , 5 , 10 times further away , its ...
... miles from the surface of the earth , or eight thousand miles from the centre . Then , as it is twice as far from the centre , its weight will be diminished 22 , or 4 times . If it were placed 3 , 4 , 5 , 10 times further away , its ...
Page 35
... miles , and the two lines will seem to unite : so we must consider this great earth as a mere speck or point at the ... miles apart , yet they would be extended so far that we could not separate them , and they would appear to pierce the ...
... miles , and the two lines will seem to unite : so we must consider this great earth as a mere speck or point at the ... miles apart , yet they would be extended so far that we could not separate them , and they would appear to pierce the ...
Page 36
... miles further away , or at the very centre of the earth , where our view would be bounded by a great circle of the earth . On the con- cave surface of the celestial sphere there are imag- ined to be drawn three systems of circles : the ...
... miles further away , or at the very centre of the earth , where our view would be bounded by a great circle of the earth . On the con- cave surface of the celestial sphere there are imag- ined to be drawn three systems of circles : the ...
Page 46
... miles . Since the orbit of the earth is elliptical , and the sun is situated at one of its foci , the earth is nearly 3,000,000 miles further from the sun in aphelion than in perihelion . As we attempt to locate the heavenly bodies in ...
... miles . Since the orbit of the earth is elliptical , and the sun is situated at one of its foci , the earth is nearly 3,000,000 miles further from the sun in aphelion than in perihelion . As we attempt to locate the heavenly bodies in ...
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ancients Andromeda angle aphelion appearance Aries astronomers atmosphere axis body Boötes bright brilliant Canis Minor Capricornus Cassiopeia celestial centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk Draco earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet Polaris precession rays revolve ring rising Saturn seasons seen shadow shines shower sidereal sidereal day solar day solar system space spots summer sun's superior planet surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible zodiac