Elements of Astronomy: Illustrated with Plates, for the Use of Schools and Academies, with QuestionsHilliard, Gray, Little, and Wilkins, 1832 - 152 من الصفحات |
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عبارات ومصطلحات مألوفة
angle aphelion apparent magnitude appear to move Aries ascertained astronomers atmosphere axis Boston called celestial equator celestial poles centre of gravity circle clock comets consequently constellation dark declination degree of heat diameter difference direction disk Dominical Letter earth's surface east eastward eclipse Epact equal equinoxes fall heat and light heavenly bodies heavens hemisphere Hence horizon hour Illustrate inhabitants Jupiter latitude length less London longitude lunar lunar eclipse Mars Mercury meridian meteor millions of miles minutes moon's nodes moon's orbit motion move round nearer nearly night noon o'clock obliquely observed parallax passing penumbra phenomena primary planets prime meridian PROB reckoned refraction retrograde motion revolution revolve round right ascension round the earth round the sun satellites Saturn secondary planets SECT seen shadow signs solar system solstice south latitude stars stone sun and moon sun's place sun's rays supposed telescope tides tion Uranus Venus visible zenith
مقاطع مشهورة
الصفحة ii - District Clerk's Office. BE IT REMEMBERED, that on the tenth day of August, AD 1829, in the fifty-fourth year of the Independence of the United States of America, JP Dabney, of the said district, has deposited in this office the title of a book, the right whereof he claims as author, in the words following, to wit...
الصفحة 29 - It is a time-piece that advances very regularly nearly four minutes a day, and no other group of stars exhibits, to the naked eye, an observation of time so easily made. How often have we heard our guides exclaim in the savannas of Venezuela, or in the desert extending from Lima to Truxillo, ' midnight is past, the cross begins to bend.
الصفحة ii - I shall detain you now no longer in the demonstration of what we should not do, but straight conduct you to a hill-side, where I will point you out the right path of a virtuous and noble education; laborious indeed at the first ascent, but else so smooth, so green, so full of goodly prospect, and melodious sounds on every side, that the harp of Orpheus was not more charming.
الصفحة 28 - ... who, uninstructed in the branches of accurate science, feel the same emotion of delight in the contemplation of the heavenly vault, as in the view of a beautiful landscape, or a majestic site. A traveller has no need of being a botanist, to recognize the torrid zone on the mere aspect of its vegetation ; and without having acquired any notions of astronomy, without any acquaintance with the celestial charts of Flamstead and De la Caille, he feels he is not in Europe, when he sees the immense...
الصفحة 28 - At a period when I studied the heavens, not with the intention of devoting myself to astronomy, but only to acquire a knowledge of the stars, I was agitated by a fear unknown to those who love a sedentary life. It seemed painful to me to renounce the hope of beholding those beautiful constellations, which border the southern pole.
الصفحة 112 - The most remote were about 9 or 10 miles distant from each other, in a line differing little from the course of the meteor. It is therefore probable that the successive masses fell in this order, the most northerly first, and the most southerly last. We think we are able to point out three principal places where stones have fallen, corresponding with the three loud cannon-like reports, and with the three leaps of the meteor, observed by Mr.
الصفحة 114 - Passing on, he was struck with surprise at seeing a spot of ground which he knew to have been recently turfed over, all torn up, and the earth looking fresh, as if from recent violence. Coming to the place, he found a great mass of fragments of a strange looking stone, and immediately called for his wife, who was second on the ground. Here were exhibited the most striking proofs of violent ^collision. A ridge of micaceous schistus lying nearly even with the ground, and somewhat inclining like the...
الصفحة 28 - ... of space remarkable for their extreme blackness, give a particular physiognomy to the Southern sky. This sight fills with admiration even those who, uninstructed in the branches of accurate science, feel the same emotion of delight in the contemplation of the heavenly vault, as in the view of a beautiful landscape, or a majestic site. A traveller has no need of being a botanist, to recognize the torrid zone on the mere aspect of its vegetation ; and without having acquired any notions of astronomy,...
الصفحة 28 - From the time we entered the torrid zone, we were never wearied with admiring, every night, the beauty of the southern sky, which, as we advanced the south, opened new constellations to our view. We feel an indescribable sensation, when, on approaching the equator, and particularly on passing from one hemisphere to the other, we see those stars, which we have contemplated from our infancy, progressively sink and finally disappear. Nothing awakens in the traveller a livelier remembrance of the immense...
الصفحة 41 - ... converted into time, shows how long it is after 6 o'clock before the sun rises, and how long before 6h the sun sets. The longest night and shortest day, therefore, become equal respectively to the longest day and shortest night, as before found. It will be perceived from what is above shown, that when the latitude and declination are both north or both south, the sun rises before and sets after 6 o'clock ; but when one is north and the other south, the sun rises after and sets before 6. 89. We...