A System of Astronomy: On the Principles of CopernicusJ.B. Moore, 1827 - 252 pages |
From inside the book
Results 1-5 of 37
Page v
... to be asked , the merest novice may be a teach- er ; and the answers may be promptly given by the most su- perficial scholar , with little or no knowledge of the subject . Their principal use undoubtedly is in reviews . But even 2 PREFACE .
... to be asked , the merest novice may be a teach- er ; and the answers may be promptly given by the most su- perficial scholar , with little or no knowledge of the subject . Their principal use undoubtedly is in reviews . But even 2 PREFACE .
Page xi
... given in all transits ; when the distance of the earth from the sun is known , the distance of the other planets may be easily found ; how the transit of Venus may be taken by one observer ; how it may be taken by two observers ; great ...
... given in all transits ; when the distance of the earth from the sun is known , the distance of the other planets may be easily found ; how the transit of Venus may be taken by one observer ; how it may be taken by two observers ; great ...
Page 17
... given by Dr. Herschel to the four small planets , discovered in the present century . Axis of the sun or a planet is the imaginary line , on which it revolves . Azimouth of a heavenly body is an arch of the horizon be- tween the ...
... given by Dr. Herschel to the four small planets , discovered in the present century . Axis of the sun or a planet is the imaginary line , on which it revolves . Azimouth of a heavenly body is an arch of the horizon be- tween the ...
Page 18
... given , or considered known . Declination of a heavenly body is its distance from the equator , reckoned on a secondary of that circle passing through the body . Depression of the horizon , the angle which the visible hori- zon makes ...
... given , or considered known . Declination of a heavenly body is its distance from the equator , reckoned on a secondary of that circle passing through the body . Depression of the horizon , the angle which the visible hori- zon makes ...
Page 32
... given to Mr. Schroeter respecting his dis- coveries in the planets ; yet , they have received notice in astronomical works ; and some account of them , as they occasionally occur , may be gratifying to the student . ELEMENTS OF MERCURY ...
... given to Mr. Schroeter respecting his dis- coveries in the planets ; yet , they have received notice in astronomical works ; and some account of them , as they occasionally occur , may be gratifying to the student . ELEMENTS OF MERCURY ...
Other editions - View all
Common terms and phrases
altitude angle aphelion appear Aries ascending node astronomers atmosphere axis bissextile calculated celestial centre comets conjunction constellation dark shadow declination degree diameter disk diurnal motion diurnal rotation divided dominical letter earth earth's shadow eclipse Epact equal equator equinox fast of clock full moon heavenly body heavens Herschel horary motion horizon hour inferior conjunction Jupiter latitude light longitude and anomaly luminous lunar lunation March Mars mean anomalies mean distance Mercury meridian miles minutes month moon's orbit obliquity observed opposite parallax parallel passing penumbra perihelion planet polar circles pole Proportional Logarithms radius reckoned refraction Retrograde motion revolution right ascension rising round the sun satellites Saturn seen semi-diameter side sidereal slow of clock solar solstice subtract Sun fast Sun slow sun's anomaly sun's mean sun's place surface tides tion transit tropic true Turn the globe Venus visible zenith
Popular passages
Page 200 - Rectify the globe to the latitude of the place; bring the sun's place in the ecliptic to the meridian, and set the index to XII.
Page ii - BBOWN, of the said district, hath deposited in this office the title of a book, the right whereof he claims as author, in the words following, to wit : " Sertorius : or, the Roman Patriot.
Page 177 - Observer' at a salary of 100£ per annum, his duty being 'forthwith to apply himself with the most exact care and diligence to the rectifying the tables of the motions of the heavens and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting the art of navigation.
Page iv - ... constitution of the universe by the means of these buildings and of observers stationed in them, shall we doubt of their usefulness to every nation? And while scarcely a year passes over our heads without bringing some new astronomical discovery to light, which we must fain receive at...
Page 179 - ... that, situated as we are in this Western hemisphere, more than three thousand miles from any fixed or known meridian, it would be proper, in a national point of view, to establish a first meridian for ourselves ; and that measures should be taken for the eventual establishment of such a meridian in the United States. In examining the maps and charts of the United States, and the particular States, or their...
Page 160 - The atmosphere is known to abound with electric matter, and the appearance of the electric matter in vacuo is exactly like the appearance of the aurora borealis, which, from its great altitude, may be considered to be in as perfect a vacuum as we can make. The electric matter in vacuo suffers the rays of light to pass through, without being affected by them. The tail of a comet does not expand itself sideways, nor does the electric matter. Hence, he supposes the tails of comets, the aurora borealis,...
Page 162 - ... aperture; and, at another time, in 41 minutes, he saw 258,000 stars pass through the field of his telescope. Every improvement in his...
Page 179 - Junonia, one of these islands, supposed to be the present island of Teneriffe. " The Arabians, it is said, fixed their firs,t meridian at the most westerly part of the continent of Africa. In the fifteenth and sixteenth centuries, when Europe was emerging from the dark ages, and a...
Page 66 - There is not, perhaps," said this great and sound astronomer, " another object in the heavens that presents us with such a variety of extraordinary phenomena as the planet Saturn ; a magnificent globe encompassed by a stupendous double ring ; attended by seven satellites; ornamented with equatorial belts; compressed at the poles ; turning on its axis ; mutually eclipsing its rings and satellites, and eclipsed by them ; the most distant of the rings also turning on its axis, and the same taking place...
Page 138 - A month in law is a lunar month, or twenty-eight days, unless otherwise expressed ; not only because it is always one uniform period, but because it falls naturally into a quarterly division by weeks. Therefore a lease for