A primary astronomy .. . of the ecliptic. 321. What characters are used to denote each? The ascending is indicated by &, and the descendingby y. (See last cut.) [These characters should be drawn upon a blackboard by the Teacher, or some oneof the class.] 322. Are the Nodes of all the planetary orbits in the same Longi-tude? They are not; but are distributed around the eclip-tic. 323. How do we describe the position of the several planetaryorbits ? By taking the ecliptic as the standard, and recordingtheir deviation from it. 324. How is this deviation ascertained? By marking the greatest distan
A primary astronomy .. . of the ecliptic. 321. What characters are used to denote each? The ascending is indicated by &, and the descendingby y. (See last cut.) [These characters should be drawn upon a blackboard by the Teacher, or some oneof the class.] 322. Are the Nodes of all the planetary orbits in the same Longi-tude? They are not; but are distributed around the eclip-tic. 323. How do we describe the position of the several planetaryorbits ? By taking the ecliptic as the standard, and recordingtheir deviation from it. 324. How is this deviation ascertained? By marking the greatest distance from the ecliptic atwhich the planet is ever seen. 325. What is the deviation of the several orbits from the planeof the ecliptic ? Mercury 7° Venus 3£ Mars 2 Flora 6 Vesta 7 Iris 5 Metis 6 Hebe 15 Astraea 5 Juno 13 Ceres 11° Pallas 344 Hygeia ,. 4 Parthenope Clio 8i Jupiter 1\ Saturn 2-f- Herschel § Neptune 1| 72 PEIMAEY ASTEONOMY. INCLINATION OF THE ORBITS OF THE SEVERAL PLANETS TO THE PLANE OFTHE [1. In this cut the large line in the center represents the plane of the ecliptic, inwhich the Earth is seen on the right and left. 2. The dotted lines crossing the ecliptic at the Suns center, represent the plane of theorbits of several of the planets, and their inclination to the ecliptic. There are somany of them, and the inclination of several is so nearly alike, that it is impossible torepresent them all in the same figure. The orbits of Mars, Jupiter, Saturn, Herschel,and Neptune are so near the ecliptic, that it would be difficult to represent theirpositions at all, except upon a very large scale. PERSPECTIVE VIEW OF THE PLANETARY ORBITS. JONO 13
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectastronomy, bookyear18
