The young gentleman's astronomy, chronology, and dialling, containing such elements of the said arts or sciences, as are most useful and easy to be known / [Edward Wells].

Edward Wells

Date:: 1725

Credit: The young gentleman's astronomy, chronology, and dialling, containing such elements of the said arts or sciences, as are most useful and easy to be known / [Edward Wells]. Source: Wellcome Collection.

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$( 7a ) Til - i CHAP. VI. ' Qf the Plraenomena of the prima¬ ry Planets, of Saturn, Jupi- * ter, Mars, Venus, and Mer- icury; as alfo of the .feconda- . ry Planets, or the Satellites of patijrn and Jupiter. i, A S there are five primary Planets Tbe'tri■ f\ befides the Earth, fa they are ’vet!min diftinguifhed, by Reafon of their guh%ed in-Situation with Refpect to the Earth, ^oSupe- Inferioar and Superiour. The inferiour, former are fuch as move between the with Re- Earth and Sun, and are two, Venm Mt-t cury; the latter are foch, as have the Orbit of the Earth between V the Sun and their own Orbits, and thefe are three, Saturn, Jupiter, and Mars» This with their refpeftive Order may be feen, Fig. i. Although both inferiour and fupe- Hence a Hour Planets agree in this, that .the tips feme Planes of their Orbits crofs the Plane pi erer.c, ^ t]^e EcUftick \ yet their different Situation$