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Astronomy Made Easy (Paperback) Loot Price: R298 Discovery Miles 2 980
Astronomy Made Easy (Paperback): William Pinnock
Astronomy Made Easy (Paperback): William Pinnock

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Astronomy Made Easy (Paperback)

William Pinnock

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Loot Price R298 Discovery Miles 2 980

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1847 edition. Excerpt: ... 12. By whom was the roundness of the earth discovered? 13. What is the earliest period mentioned in history of an eclipse? 14. What do these calculations evidently imply? 15. To whom must this form also have been known? OF THE MOTIONS OF THE EARTH. 1. The velocity of the Earth round its axis is not equal, differing according to the distance from the Equator. 2. It is swiftest at the equator on account of passing through a greater space; whence its rapidity gradually decreases towards the poles, in consequence of passing through less space, but in the same time. 3. From this revolution of the Earth upon its axis arises the difference of Day and Night; for in those parts of the Earth that are turned towards the Sun, it will be Day; and in those turned from it, Night. 4. The second motion of the Earth is its change of place round the Sun, whereby every part of it moves through the same space, with the same velocity. 5. This motion is determined by the distance of the Earth from the Sun, or the semi-diameter of the Orbit in which it performs its annual revolution, moving in a day one degree. 6. From this motion are occasioned the vicissitudes of the seasons; for as the Earth in this course keeps its axis equally inclined every where to the plane of the Ecliptic, and parallel to itself, and as the plane of the Ecliptic inclines twenty-three degrees and one half towards the Equator, the Earth in this direction has sometimes one of its poles nearest the Sun, and sometimes the other. 7. Hence are heat and cold, summer and winter, and Lengths of days and nights 8. If, as in the above engraving, two hoops be fixed in the direction of E and F, and a candle placed at S, we may, by suspending a ball at A, twirled round by a thread, and moving it...


Imprint: Theclassics.Us
Country of origin: United States
Release date: September 2013
First published: September 2013
Authors: William Pinnock
Dimensions: 246 x 189 x 1mm (L x W x T)
Format: Paperback - Trade
Pages: 20
ISBN-13: 978-1-230-19798-2
Barcode: 9781230197982
Categories: Books > Science & Mathematics > Astronomy, space & time
Books > Science & Mathematics > Astronomy, space & time > General
LSN: 1-230-19798-2

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