Astronomy for High Schools and Colleges |
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Astronomy for High Schools and Colleges Edward Singleton Holden,Simon Newcomb No preview available - 2016 |
Astronomy for High Schools and Colleges Edward Singleton Holden,Simon Newcomb No preview available - 2016 |
Common terms and phrases
altitude amount angle angular appear astronomers atmosphere attraction axis called celestial equator celestial sphere centre circle clock comet constellation declination determine diameter direction disk diurnal diurnal motion earth east eclipse equal equator eye-piece fixed stars force gravitation heat heavenly bodies heavens Hence HERSCHEL horizon hour angle inferior conjunction interval Jupiter kilometres known latitude latter length light longitude lunar magnitude Mars mass mean distance measured Mercury meridian meteoroids meteors Milky months moon moon's motion move naked eye nearly nebula Neptune node number of stars object observer orbit parallax pass perihelion period photosphere planet planetary pole position proper motion radius ratio rays refraction revolution revolving right ascension ring rotation satellites Saturn seen shadow sidereal solar system spectrum spots sun's supposed telescope theory tion transit Uranus velocity Venus vernal equinox visible zenith
Popular passages
Page 134 - The change of motion is proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
Page 139 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Page 134 - To every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.
Page vii - ... the type. The portions in large type form a complete course for the use of those who desire only such a general knowledge of the subject as can be acquired without the application of advanced mathematics. The portions in small type comprise additions for the use of those students who either desire a more detailed and precise knowledge of the subject, or who intend to make astronomy a special study. From CA YOUNG, Professor in Princeton College : " I conclude that it is decidedly superior to anything...
Page vii - To facilitate its use by students of different grades, the subject-matter is divided into two classes, distinguished by the size of the type. The portions in large type form a complete course for the use of those who desire only such a general knowledge of the subject as can be acquired without the application of advanced mathematics. The portions in small type comprise additions for the use of those students who either desire a more detailed and precise knowledge of the subject, or who intend to...
Page 170 - ECLIPSES OF THE MOON. The mean distance of the moon from the earth is about 60 radii of the latter, while, as we have just seen, the length EV of the earth's shadow is 217 radii of the earth. Hence when the moon passes through the shadow she does so at a point less than three tenths of the way from E to V. The radius of the shadow here will be HYi44 of the radius EB of the earth, a quantity which we readily find to be about 4600 kilometres.
Page 134 - Every body continues in its state of rest or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Page 125 - The square of the period of a planet is proportional to the cube of its mean distance from the Sun.
Page 177 - If the orbit of the moon around the earth were in or near the plane of the ecliptic there would be an eclipse of the sun at every new moon, and an eclipse of the moon at every full moon. But...
Page 100 - In this case, it is obvious that the plane of the circle of illumination would be perpendicular to a line drawn from the centre of the sun to the centre of the earth...