The use of the globes1844 |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
angle Arcturus Aries ascension and declination Atlantic Ocean azimuth Baltic Sea brass meridian bring the sun's Canis Minor Cape Caribbean Sea climate compass constellation Deneb dian difference of latitude difference of longitude distance Dublin earth east eastern edge eastward ecliptic Elevate the pole English equator equinoctial equinox Exercises find the sun's frigid zones given day given hour given latitude given place given star Given the latitude Grecian Sea heliacally horizon hour circle Indian Ocean Island Isles Pacific Ocean latitude Libra longest day Mediterranean Sea meri meridian altitude moon moon's place morning night node noon north pole number of degrees o'clock oblique ascension observed orbit Pacific Ocean parallel passed the meridian planet port PROB quadrant of altitude Rectify the globe right ascension rise and set ship sails sphere sun's declination sun's place terrestrial globe tude turn the globe Ursa Major verb vertical western side zenith
Δημοφιλή αποσπάσματα
Σελίδα 106 - The poetical rising and setting of the stars, is so called because the ancient poets referred the rising and setting of the stars to the sun. When a star rose with the sun, or set when the sun rose, it was said to rise and set cosmically. When a star rose at sunsetting, or set with the sun, it was said to rise and set achnmicaUy. When a star first became visible in the morning...
Σελίδα 78 - We all knew from our school-boy days that, at the poles of the earth there is but one day and one night in the year ; but, when brought face to face with the reality, it is hard to realize.
Σελίδα 106 - The ascensional or descensional difference is the difference between the right and oblique ascension, or the difference between the right and oblique descension ; and, with respect to the sun, it is the time he rises before six in the spring and summer, or sets before six in the autumn and winter.
Σελίδα 120 - Put the centre of the quadrant of altitude on the pole of the ecliptic, and its graduated edge on the star ; then the degree of the quadrant cut by the star is its latitude ; and the degree of the ecliptic cut by the quadrant is its longitude.
Σελίδα 105 - ... on the real globe of the earth. The diurnal motion of this globe is from west to east. 2. The CELESTIAL GLOBE is an artificial representation of the heavens, on which the stars are laid down in their natural situations. The diurnal motion of this globe is from east to west, and represents the apparent diurnal motion of the sun, moon and stars. In using this globe, the student is supposed to be situated in the centre of it, and viewing the stars in the concave surface.
Σελίδα 105 - The greatest declination the sun can have, is 23° 28' ; the greatest declination a star ran have, is 90°, and that of a planet, 30° 2& north or south. The latitude of a star, or planet, is its distance from the ecliptic, north or south, reckoned towards the pole of the ecliptic, on the quadrant of altitude. Some...
Σελίδα 71 - Rectify the globe for the latitude of the place. Bring the sun's place in the ecliptic to the meridian, and set the index at 12.
Σελίδα 106 - OBLIQUE ASCENSION of the sun, or of a star, is that degree of the equinoctial which rises with the sun or slar, in an oblique sphere, and is likewise counted from the point Aries eastward round the globe.
Σελίδα 112 - Uranometria, being a complete atlas of all the constellations, with the useful invention of denoting the stars in. every constellation by the letters of the Greek and Roman Alphabets ; setting the first Greek letter a.