Outlines of Astronomy |
From inside the book
Results 1-5 of 100
Page xii
... Sun. Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Mean and true longi- tudes of the Sun ...
... Sun. Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Mean and true longi- tudes of the Sun ...
Page xiii
... of the Earth round the Sun in accordance with these laws . Masses of the Earth and Sun compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion ....... 233 ...
... of the Earth round the Sun in accordance with these laws . Masses of the Earth and Sun compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion ....... 233 ...
Page xv
... Sun. Situation of the solar apex . Agreement of southern and northern stars in giving the same result . Principles on which the investigation of the solar motion depends . Absolute velocity of the Sun's motion . Supposed revolution of ...
... Sun. Situation of the solar apex . Agreement of southern and northern stars in giving the same result . Principles on which the investigation of the solar motion depends . Absolute velocity of the Sun's motion . Supposed revolution of ...
Page 42
... sun's rays , and which lies above the visible horizon B R of B , it receives a twilight , which is strongest at R , the point immediately below which the sun is , and fades away gradually towards P , as the luminous part of the atmo ...
... sun's rays , and which lies above the visible horizon B R of B , it receives a twilight , which is strongest at R , the point immediately below which the sun is , and fades away gradually towards P , as the luminous part of the atmo ...
Page 43
... sun , for instance , which at a considerable altitude always appears round , assumes , as it approaches the horizon , a ... sun's circumference equally raised by re- fraction , it would still appear circular , though displaced ; but the ...
... sun , for instance , which at a considerable altitude always appears round , assumes , as it approaches the horizon , a ... sun's circumference equally raised by re- fraction , it would still appear circular , though displaced ; but the ...
Other editions - View all
Common terms and phrases
altitude amount angle angular appear apsides ascertained astronomers axis bright calculation celestial centre circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity greater heavens heliocentric horizon inclination increase inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perpendicular perturbations planet planetary pole portion position precession proper motions proportion recede recess reckoned refraction remarkable respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose syzygies tangential force telescope tion Uranus variation velocity visible whole zenith