Astronomy: A Popular HandbookMacmillan Company, 1915 - 435 oldal |
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actual altitude angle angular diameter angular distance apparent motion appear approximately ascertain astronomers atmosphere axial rotation axis body bright calculate calendar called celestial equator celestial meridian celestial pole celestial sphere clock comet Consequently course difference direction disk diurnal circles earth earth's orbit ecliptic circle equal explained fixed stars full-moon gravitational attraction Greenwich Gregorian calendar hemisphere Hipparchus horizon hour-angle inferior planets Julian calendar Jupiter known latitude leap-year length light longitude lunar Mars mass mean solar measured Mercury meteors method miles moon moon's move nebula node observations observatory occur orbital motion orbital revolution pendulum photograph planet planetary Plate Pole Star position possible projected proper motion radius remainder right-ascension satellite Saturn seen shows sidereal day sidereal period solar system space spectroscope spectrum stellar sun's supposed surface synodic period telescope terrestrial theory tion torsion balance triangle velocity Venus vernal equinox visible zenith
Népszerű szakaszok
153. oldal - forthwith to apply himself with the most exact care and diligence to the rectifying the tables of the motions of the heavens, and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting the art of navigation.
v. oldal - That not to know at large of things remote From use, obscure and subtle, but to know That which before us lies in daily life, Is the prime wisdom...
182. oldal - The squares of the times of revolution (or years) of the planets are proportional to the cubes of their average distances from the sun.
181. oldal - Kepler's laws of planetary motion: (1) the orbit of each planet is an ellipse with the Sun at one...
99. oldal - Thus he proposed his law of universal gravitation, which we can state as follows: Every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them.
180. oldal - Every particle of matter, in the universe, attracts every other particle with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
417. oldal - METEOROLOGY. WEATHER AND METHODS OF FORECASTING. Description of Meteorological Instruments, and River Flood Predictions in the United States.
137. oldal - Monday 2 Tuesday 3 Wednesday 4 Thursday 5 Friday 6 Saturday 7 SUNDAY 8 Monday 9 Tuesday 10 Wednesday 11 Thursday 12 Friday 13 Saturday 14 SUNDAY 15 Monday 16 Tuesday 17 Wednesday 18 Thursday 19...
417. oldal - 06. 150w. Newcomb, Simon. Compendium of spherical astronomy with its applications to the determination and reduction of positions of the fixed stars. *$3. Macmillan. "The first of a projected series having the double purpose of developing the elements of practical and theoretical astronomy for the spe-cial student of the subject, and of serving as a handbook of convenient reference for the use of the working astronomer in applying methods and formula:.
415. oldal - AN attempt has been made in this volume to give a somewhat -£*- satisfactory account of many parts of Celestial Mechanics rather than an exhaustive treatment of any special part. The aim has been to present the work so as to attain logical sequence, to make it progressively more difficult, and to give the various subjects the relative prominence which their scientific and educational importance deserves. In short, the aim has been to prepare such a book that one who has had the necessary mathematical...