Fourteen Weeks in Descriptive Astronomy |
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Page 17
... ecliptic . He also predicted an eclipse of the sun which is memorable in ancient history as having terminated a war between the Medes and Lydians . These nations were engaged in a fierce battle , but the awe produced by the darkening of ...
... ecliptic . He also predicted an eclipse of the sun which is memorable in ancient history as having terminated a war between the Medes and Lydians . These nations were engaged in a fierce battle , but the awe produced by the darkening of ...
Page 36
... the EQUINOCTIAL , and the ECLIPTIC Systems . Each of these has ( 1 ) its Principal Circle , ( 2 ) its Subordinate Circles , ( 3 ) its Points , and ( 4 ) its Meas- urements . • I. THE HORIZON SYSTEM . ( a ) The PRINCIPAL 36 INTRODUCTION .
... the EQUINOCTIAL , and the ECLIPTIC Systems . Each of these has ( 1 ) its Principal Circle , ( 2 ) its Subordinate Circles , ( 3 ) its Points , and ( 4 ) its Meas- urements . • I. THE HORIZON SYSTEM . ( a ) The PRINCIPAL 36 INTRODUCTION .
Page 39
... Ecliptic ( the sun's apparent path through the heavens ) intersect . ( d ) The MEASUREMENTS are Right Ascension ( R. A. ) , Declination , and Polar Distance . Right Ascension is distance from the Vernal Equi- nox , measured on the ...
... Ecliptic ( the sun's apparent path through the heavens ) intersect . ( d ) The MEASUREMENTS are Right Ascension ( R. A. ) , Declination , and Polar Distance . Right Ascension is distance from the Vernal Equi- nox , measured on the ...
Page 40
... ECLIPTIC SYSTEM . ( a ) The PRINCIPAL CIRCLE is the Ecliptic . This is 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 ...
... ECLIPTIC SYSTEM . ( a ) The PRINCIPAL CIRCLE is the Ecliptic . This is 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 ...
Page 41
... Ecliptic are the points where the axis of the earth's orbit meets the Celestial Sphere . ( Little used . ) The Equinoxes are the points where the ecliptic intersects the equinoctial . The place where the sun crosses the equinoctial * in ...
... Ecliptic are the points where the axis of the earth's orbit meets the Celestial Sphere . ( Little used . ) The Equinoxes are the points where the ecliptic intersects the equinoctial . The place where the sun crosses the equinoctial * in ...
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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