Fourteen Weeks in Descriptive Astronomy |
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Page 86
... diameter in these different positions varies in the same proportion as the distances , or as three to one . The greatest and least distances vary ac- cording as either planet may happen to be in aphe- lion or perihelion . If at inferior ...
... diameter in these different positions varies in the same proportion as the distances , or as three to one . The greatest and least distances vary ac- cording as either planet may happen to be in aphe- lion or perihelion . If at inferior ...
Page 89
... diameter . VENUS . The Queen of Beauty . Sign ?, a looking - glass . DESCRIPTION . - Venus , the next in order to Mer- cury , is the most brilliant of all the planets . When visible before sunrise , she was called by the ancients ...
... diameter . VENUS . The Queen of Beauty . Sign ?, a looking - glass . DESCRIPTION . - Venus , the next in order to Mer- cury , is the most brilliant of all the planets . When visible before sunrise , she was called by the ancients ...
Page 96
... oblate spheroid . Its polar diameter is about 7,899 miles , and its equatorial about 7,925 . The com- pression is , therefore , about 26 miles . ( See table in Appendix . ) If we represent the earth by 96 THE SOLAR SYSTEM . THE EARTH.
... oblate spheroid . Its polar diameter is about 7,899 miles , and its equatorial about 7,925 . The com- pression is , therefore , about 26 miles . ( See table in Appendix . ) If we represent the earth by 96 THE SOLAR SYSTEM . THE EARTH.
Page 97
... diameter , the polar diameter would be one - tenth of an inch too long . It has been recently Fig . 27 . shown that the equator itself is not a perfect circle , but is somewhat flattened , since the diameter which pierces the meridian ...
... diameter , the polar diameter would be one - tenth of an inch too long . It has been recently Fig . 27 . shown that the equator itself is not a perfect circle , but is somewhat flattened , since the diameter which pierces the meridian ...
Page 98
... diameter , the land , to be in proportion , should be represented by the thinnest writing - paper , the hills by small grains of sand , and elevated ranges by thick drawing - paper . To represent the deepest wells or mines , a scratch ...
... diameter , the land , to be in proportion , should be represented by the thinnest writing - paper , the hills by small grains of sand , and elevated ranges by thick drawing - paper . To represent the deepest wells or mines , a scratch ...
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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