The Ottawa Naturalist Volume 7-8. Ottawa Field Club
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Author: Ottawa Field Club
Number of Pages: 128 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130672329
File size: 18 Mb
File Name: The.Ottawa.Naturalist.Volume.7-8.pdf
Download Link: The Ottawa Naturalist Volume 7-8
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...ask your attention to-night. Speaking broadly, any of these planets will be seen to travel over the same course as the Moon, that is from west to east, among the zodiacal constellations--but, of course, with much greater slowness. If we could view the Earth's motion in the zodiac from the Sun as our station of observation, (and though this cannot be done in fact, it may easily be done with the aid of imagination), we should see the Earth complete the circle from Virgo, in March, to Leo, in the following February; in other words the Earth requires twelve months to pass across the faces of the twelve zodiacal constellations as seen from the Sun. If now from our heliocentric position we watch the journey of Jupiter around the same course, we should have to wait n.86 years to see the course completed, --or while the Earth passes from one constellation to the next in a month, Jupiter takes about a year to travel over the same arc. This is partly due to the fact that his orbital velocity in miles per unit of time is to that of the Earth as 4 to 9, and partly to the much greater length of his orbit, which is a circle having a radius about five times that of the Earth's orbital radius. But, although the rates of motion would be very different, the directions would be the same; from Libra to Scopio; from Scorpio to Sagittarius, and so on eastward, just as in the case of the Moon. If now, still occupying the Sun's place, we were to watch the progress of both planets, it is evident that we should see the Earth make the complete circuit of the zodiac nearly twelve times while Jupiter made the journey once. And further, we should see the Earth pass Jupiter's place, say in Aries, in a particular year, while in the following year our planet would pass Jupiter in Taurus, an..
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