Fourteen Weeks in Descriptive Astronomy |
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Page 35
... earth as a mere speck or point at the centre of the Celestial Sphere . Second , that we must even neg- lect the entire diameter of the earth's orbit , so that if we should draw two parallel lines , one from each end of the earth's orbit ...
... earth as a mere speck or point at the centre of the Celestial Sphere . Second , that we must even neg- lect the entire diameter of the earth's orbit , so that if we should draw two parallel lines , one from each end of the earth's orbit ...
Page 36
... earth , and in every part of the earth's orbit , we see the fixed stars in the same place . This sphere of stars sur- rounds the earth on every side . In the daytime we cannot see the stars because of the superior light of the sun ; but ...
... earth , and in every part of the earth's orbit , we see the fixed stars in the same place . This sphere of stars sur- rounds the earth on every side . In the daytime we cannot see the stars because of the superior light of the sun ; but ...
Page 37
... earth , separates the visible from the invisible heavens . The Sensible Horizon is the small circle where the earth and sky seem to meet ; it is parallel to the rational horizon , but distant from it the semi - diameter of the earth ...
... earth , separates the visible from the invisible heavens . The Sensible Horizon is the small circle where the earth and sky seem to meet ; it is parallel to the rational horizon , but distant from it the semi - diameter of the earth ...
Page 39
... earth are the extremities of the earth's axis . The North Point is marked very nearly by the North Star , and every direction from that is reckoned South , and every direction toward that is reckoned North , however it may conflict with ...
... earth are the extremities of the earth's axis . The North Point is marked very nearly by the North Star , and every direction from that is reckoned South , and every direction toward that is reckoned North , however it may conflict with ...
Page 40
... earth's orbit about the sun , or the apparent path of the sun in the heavens . It is inclined to the equinoctial 23 ° 28 ' , which measures the inclina- tion of the Earth's Equator to its orbit , and is called the obliquity of the ...
... earth's orbit about the sun , or the apparent path of the sun in the heavens . It is inclined to the equinoctial 23 ° 28 ' , which measures the inclina- tion of the Earth's Equator to its orbit , and is called the obliquity of the ...
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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