Guys̕ Elements of Astronomy: And, An Abridgement of Keiths' New Treatise on the Use of the Globes |
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Common terms and phrases
analemma angle Answer appear astronomers attraction azimuth Boötes brass meridian called Cancer Capricorn centre CHAPTER Comet conjunction diameter difference diurnal diurnal motion earth earth's axis east eastward ecliptic Elevate the pole equal equator equinoctial points equinox find the sun's fixed stars full moon given place globe westward greatest grees harvest moon heavens hemisphere hence high water horizon hour-circle index has passed inferior conjunction inhabitants Jupiter latitude length Libra light London longest day longitude mean distance Mercury meridian altitude miles month morning motion move nearly node north pole number of degrees o'clock oblique observed opposite parallax parallel Pisces Pisces and Aries planets plate polar circles PROBLEM quadrant of altitude reckoning revolution revolve right ascension rising and setting round the sun satellites Saturn seen set the index shadow shine signs solar south pole sun's declination sun's place supposed tides transits of Venus tropic turn the globe twilight Venus vertical
Popular passages
Page 77 - ... the western edge of the horizon, and the index will show the time of...
Page 83 - 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.
Page 41 - The ecliptic is that great circle in the heavens which the sun appears to describe in the course of a year.
Page 64 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
Page 1 - The Radius of a circle is a line drawn from the centre to the circumference.
Page 2 - A Right angle is that which is made by one line perpendicular to another. Or when the angles on each side are equal to one another, they are right angles.
Page 119 - Elevate the globe to so many degrees above the horizon as are equal to the latitude of the place...
Page 91 - ... the action of the sun, which brings them on sooner when the moon is in her first and third quarters, and keeps them back later when she is in her second and fourth : because, in the former case, the tide raised by the sun alone would be earlier than the tide raised by the moon : and, in the latter case later.
Page 134 - Find the longitude of the given place on the equator, bring it to that part of the brass meridian which is numbered from the equator towards the poles ; and then, under the given latitude, on the brass meridian, you will find the place required.
Page 1 - The AMPLITUDE of any object in the heavens is an arc of the horizon, contained between the centre of the object when rising, or setting, and the east or west points of the horizon.