Fourteen Weeks in Descriptive Astronomy |
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Page 15
... paths to a nicety of which we can scarcely conceive , and at last it has analyzed the structure of the sun and far - off stars , announ- cing the very elements of which they are composed . Observing for several evenings those stars ...
... paths to a nicety of which we can scarcely conceive , and at last it has analyzed the structure of the sun and far - off stars , announ- cing the very elements of which they are composed . Observing for several evenings those stars ...
Page 33
... of fig- ures to find how much the moon's path around the earth curves each second . He reached the result at last . It was nearly , but not quite exact . Disap- pointed , he laid aside his calculations . Repeatedly he HISTORY . 33.
... of fig- ures to find how much the moon's path around the earth curves each second . He reached the result at last . It was nearly , but not quite exact . Disap- pointed , he laid aside his calculations . Repeatedly he HISTORY . 33.
Page 34
... paths . At last he announced this grand Law of Gravitation : EVERY PARTICLE OF MATTER IN THE UNIVERSE AT- TRACTS EVERY OTHER PARTICLE OF MATTER WITH A FORCE DIRECTLY PROPORTIONAL TO ITS QUANTITY OF MATTER , AND DECREASING AS THE SQUARE ...
... paths . At last he announced this grand Law of Gravitation : EVERY PARTICLE OF MATTER IN THE UNIVERSE AT- TRACTS EVERY OTHER PARTICLE OF MATTER WITH A FORCE DIRECTLY PROPORTIONAL TO ITS QUANTITY OF MATTER , AND DECREASING AS THE SQUARE ...
Page 39
... 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 equinoctial eastward . R. A. ...
... 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 equinoctial eastward . R. A. ...
Page 40
... 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 ecliptic . • ( b ) The SUBORDINATE CIRCLES are ...
... 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 ecliptic . • ( b ) The SUBORDINATE CIRCLES are ...
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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