Outlines of astronomy |
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Page xx
... surface . Statical and dynamical measures of gravity . The pendulum . Gravity to a spheroid . Other effects of the Earth's rotation . Trade winds . Determination of geographical positions of latitudes — of longitudes . Conduct of a ...
... surface . Statical and dynamical measures of gravity . The pendulum . Gravity to a spheroid . Other effects of the Earth's rotation . Trade winds . Determination of geographical positions of latitudes — of longitudes . Conduct of a ...
Page 16
... surface laterally ; it must have not only bounds in a horizontal direction , but also an under side round which the sun , moon , and stars can pass ; and that side must , at least , be so far like what we see , that it must have a sky ...
... surface laterally ; it must have not only bounds in a horizontal direction , but also an under side round which the sun , moon , and stars can pass ; and that side must , at least , be so far like what we see , that it must have a sky ...
Page 17
... surface , while yet the absolute quantity of it seen at once has been increased . ( 21. ) The same appearances are observed universally , in every part of the earth's surface visited by man . Now , the figure of a body which , however ...
... surface , while yet the absolute quantity of it seen at once has been increased . ( 21. ) The same appearances are observed universally , in every part of the earth's surface visited by man . Now , the figure of a body which , however ...
Page 18
... surface the circle NOPQ . The area of the spherical surface compre- Z B EA K G hended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle N M Q included between the two extreme visual ...
... surface the circle NOPQ . The area of the spherical surface compre- Z B EA K G hended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle N M Q included between the two extreme visual ...
Page 19
... surface , the legs will open , and the ruler will become more nearly straight , but will not attain perfect straightness till M is brought fairly up to contact with the surface at m , in which case its whole length will become a tangent ...
... surface , the legs will open , and the ruler will become more nearly straight , but will not attain perfect straightness till M is brought fairly up to contact with the surface at m , in which case its whole length will become a tangent ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Julian period 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 perturbations phænomena planet planetary pole portion position precession proper motions proportion recede reckoned refraction remarkable respect result revolution revolving right ascension rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole zenith