An epitome of astronomy: containing the information requisite for the solution of the entire series of astronomical questions given at the A.B. pass examinations in the London university, from its foundation to the present time1853 |
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An Epitome of Astronomy: Containing the Information Requisite for the ... J Tabor Sin vista previa disponible - 2016 |
Términos y frases comunes
amongst the fixed angle antarctic circle apparent diameter arctic circle Aries astronomers attraction axis brass meridian bright star called Capricorn cause celestial centre of gravity comets consequently constellation dark degrees direction earth earth's surface emersions entering the sign entire revolution equator equinoctial points equinoxes fixed stars heavenly bodies heavens inclination inferior conjunction inferior planet Jupiter latitude light longitude magnitude according Mars mean distance miles in diameter minutes moon move nodes north pole observed opposition orbit passing path round penumbra perpendicular Plate points of intersection pole star position precession proceeding produced rays represent retrograde motion revolves round ring rise rotates round the earth round the sun satellites seen semicircle shadow sidereal sign Cancer solar system south pole southern horizon spectator stationary point sun will appear sun's superior planets supposed telescope tides total eclipse tropic of Cancer tropic of Capricorn umbra Uranus waters west to east whilst
Pasajes populares
Página 34 - If the orbit of the moon around the earth were in or near the plane of the ecliptic there would be an eclipse of the sun at every new moon, and an eclipse of the moon at every full moon. But...
Página 34 - An eclipse of the sun is caused by the moon passing between the earth and the sun, so that the shadow of the moon falls on the earth.
Página 34 - ... small portion of the hemisphere on which the moon's shadow falls, it happens that for any particular place on the earth, lunar eclipses are more frequently...
Página 16 - Problem 12 : ihen elevate the pole as many degrees above the horizon as are equal to the latitude of that place, and bring it to the brass meridian ; so will it then be the zenith or centre of the horizon.
Página 11 - Azimuth, or vertical circles, are great circles which pass through the zenith and nadir, and are perpendicular to the horizon. If the quadrant of altitude be fixed upon the zenith, and brought to any part of the horizon, it will represent the quadrant of a vertical circle.
Página 10 - A sphere means a circle round a sphere the plane of which passes through the centre of the sphere, and divides it into two hemispheres.
Página 9 - When I consider the heavens, the work of thy fingers, the moon and the stars which thou hast ordained, what is man that thou art mindful of him, and the son of man that thou visitest him...
Página 11 - Horizon is a circle parallel to the former, the plane of which passes through the centre of the earth, and cuts the heavens into two equal hemispheres.
Página 21 - A particular place, and the hour of the day at that place being given, to find what hour it is at any other place. RULE. Bring the place at which the time is given to the brass meridian, and set the index of the hour circle...
Página 11 - ... declination, it rises to the south of the east, and sets to the south of the west. At the time of the equinoxes, when the sun has no declination, viz. on the 21st of March, and on the 23d of September, it rises exactly in the east, and sets exactly in the west. 49. The AZIMUTH of any object in the heavens is an arc of the horizon, contained between a vertical circle passing through the object, and the north or south points of the horizon. The azimuth of the sun, at any particular hour, is used...