Rudimentary Astronomy |
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Page 11
... horizontal , or at right angles to the vertical ; or thirdly , by means of a spirit level , that is , of a horizontal glass tube slightly curved , and nearly filled with ether , or other volatile fluid , in which case the bubble or ...
... horizontal , or at right angles to the vertical ; or thirdly , by means of a spirit level , that is , of a horizontal glass tube slightly curved , and nearly filled with ether , or other volatile fluid , in which case the bubble or ...
Page 30
... horizontal circles , taking the transit of the object as it passes obliquely through the field , over the vertical or the horizontal wires , and reading the microscopes of the horizontal or the vertical circle , accordingly as azimuth ...
... horizontal circles , taking the transit of the object as it passes obliquely through the field , over the vertical or the horizontal wires , and reading the microscopes of the horizontal or the vertical circle , accordingly as azimuth ...
Page 41
... horizontal equatorial parallax = Hence , sin . A M C sin . hor . eq . par . Earth's equat ' . radius . Moon's distance . Earth's rad . at Greenwich Earth's equatorial rad . x sin . z A M. Call then horizontal equatorial parallax = P ...
... horizontal equatorial parallax = Hence , sin . A M C sin . hor . eq . par . Earth's equat ' . radius . Moon's distance . Earth's rad . at Greenwich Earth's equatorial rad . x sin . z A M. Call then horizontal equatorial parallax = P ...
Contents
Early cultivation of the science of astronomy | 1 |
General aspect of the ordinary phenomena of the heavens | 2 |
Apparent revolution of all the heavenly bodies round a fixed axis | 3 |
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61 Cygni aberration accuracy angular distance appeared apsides axis calculated catalogue centre comet computed constellations correction describe determining diameter direction discovered discovery disk disturbing diurnal diurnal motion earth earth's orbit earth's surface ecliptic effect elements elliptic orbit epoch equal equator equatorial equinox error evection excentricity fixed force geocentric gravitation greater number Greenwich heavens Heliometer Hence Herschel horizontal inclination instrument Jupiter Kepler's known latitude longitude lunar orbit magnitude mass mean anomaly mean distance measured meridian micrometer moon moon's moving mural circle nearly Neptune node nutation object observations Observatory Otto Struve parallax perigee perihelion period phenomena planet planetary polar distance pole position precession proper motions quantity radius reader refraction remarkable revolution revolve right angles right ascension round the sun satellites Saturn sidereal sidereal period space stars sun's superior planets supposed syzygy telescope tion transit treatise true anomaly velocity Venus vertical wire zenith distances