Fourteen Weeks in Descriptive Astronomy |
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Page 10
... earth has long been a mooted question . The best authorities , at present , estimate the average heat of the moon - beam at about 280,000 that which we receive from the sun , or sufficient to raise the temperature of a sensitive black ...
... earth has long been a mooted question . The best authorities , at present , estimate the average heat of the moon - beam at about 280,000 that which we receive from the sun , or sufficient to raise the temperature of a sensitive black ...
Page 20
... earth is the fixed centre around which the sun and the heavenly bodies move . They then conceived that a bar , or some- thing equivalent , is connected at one end with the earth ; that at some part of this bar the sun is at- tached ...
... earth is the fixed centre around which the sun and the heavenly bodies move . They then conceived that a bar , or some- thing equivalent , is connected at one end with the earth ; that at some part of this bar the sun is at- tached ...
Page 24
... earth once in twenty - four hours , the earth simply turns on its own axis : that this produces the apparent daily revolution of the sun and stars ; while the yearly motion of the earth about the sun , transferred in the same manner to ...
... earth once in twenty - four hours , the earth simply turns on its own axis : that this produces the apparent daily revolution of the sun and stars ; while the yearly motion of the earth about the sun , transferred in the same manner to ...
Page 29
... earth's time of revolu- tion by P , and her distance from the sun by p , then letting D and d represent the same in another planet , we have the proportion P : D ' :: p ' : d . Kepler , strangely enough , believed in the " Music of the ...
... earth's time of revolu- tion by P , and her distance from the sun by p , then letting D and d represent the same in another planet , we have the proportion P : D ' :: p ' : d . Kepler , strangely enough , believed in the " Music of the ...
Page 33
... earth bends it downward , just as it does the stone ? Newton knew that a stone falls toward the earth sixteen feet the first second . He imagined , after a careful study of Kepler's laws , that the attraction of the earth diminishes ...
... earth bends it downward , just as it does the stone ? Newton knew that a stone falls toward the earth sixteen feet the first second . He imagined , after a careful study of Kepler's laws , that the attraction of the earth diminishes ...
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Common terms and phrases
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