Elements of Astronomy: Illustrated with Plates, for the Use of Schools and Academies, with Questions |
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Page 12
... effect is very much greater than is represented on the figure . For while Venus passes superior according to the degree of heat and light which they receiv- ed ; that is , according to their proximity to the sun . This distinction of ...
... effect is very much greater than is represented on the figure . For while Venus passes superior according to the degree of heat and light which they receiv- ed ; that is , according to their proximity to the sun . This distinction of ...
Page 15
... from their base , and that the process of destructive separation which we had only contemplat- ed in its effects , is about to be exhibited before us in tremendous real- ity , The mountains , called the Apennines , which Of the Moon . 15.
... from their base , and that the process of destructive separation which we had only contemplat- ed in its effects , is about to be exhibited before us in tremendous real- ity , The mountains , called the Apennines , which Of the Moon . 15.
Page 55
... effects of a par- ticular eclipse were aimed . Treatises were written to show , that the effects of an eclipse of the sun continued as many years as the eclipse lasted hours ; and that of the moon as many months . A total eclipse of the ...
... effects of a par- ticular eclipse were aimed . Treatises were written to show , that the effects of an eclipse of the sun continued as many years as the eclipse lasted hours ; and that of the moon as many months . A total eclipse of the ...
Page 56
... effect is no where more striking than in sailing near a shore or coast . It is difficult for a person in this situa- tion for the first time , to realize that himself , and not the land , is in motion . So by the earth's motion on its ...
... effect is no where more striking than in sailing near a shore or coast . It is difficult for a person in this situa- tion for the first time , to realize that himself , and not the land , is in motion . So by the earth's motion on its ...
Page 60
... effect is called the aberration of light , and amounts to about 20 " of a degree . If the pupil find the preceding illustration difficult to be under- stood , it may perhaps be rendered more intelligible , if we suppose the line a c to ...
... effect is called the aberration of light , and amounts to about 20 " of a degree . If the pupil find the preceding illustration difficult to be under- stood , it may perhaps be rendered more intelligible , if we suppose the line a c to ...
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Common terms and phrases
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 difference direction disk Dominical Letter earth's surface east eastward eclipse Epact equal equinoxes fall Golden Number heat and light heavenly bodies heavens hemisphere Hence horizon hour Illustrate inhabitants Jupiter latitude length less London longitude lunar lunar eclipse Mercury meridian meteor 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
Popular passages
Page 29 - In the solitude of the seas, we hail a star as a friend from whom we have been long separated. Among the Portuguese and the Spaniards, peculiar motives seem to increase this feeling ; a religious sentiment attaches them to a constellation, the form of which recalls the sign of the faith planted by their ancestors in the deserts of the new world...
Page 29 - The two great stars which mark the summit and the foot of the Cross having nearly the same right ascension, (see No.
Page 28 - 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. Impatient to rove in the equinoctial regions, I could not raise my eyes...
Page 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.
Page 112 - ... 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. Staples. There were some circumstances common to all the cases. There was in...
Page 66 - When the sun and star are both together at °p , they are in the same meridian ; but when the star comes to 1, and the sun to a, they are not in the same meridian, but the sun is westward of the star's meridian ; consequently as the earth turns on its axis from west to east, any particular place will come under the sun's meridian sooner than under the star's meridian ; that is, it is noon by the sun before it is by the star or by a clock. (For were the sun where the star is, the sun would agree with...
Page 15 - ... below, seem to bid defiance to the laws of gravitation. Around the base of these frightful eminences, are strewed numerous loose and unconnected fragments, which time seems to have detached from their parent mass ; and when we examine the rents and ravines which accompany the over-hanging cliffs, we expect every moment that they are to be torn from their base, and that the process of destructive separation which we had only contemplated in its effects, is about to be exhibited before us in tremendous...