Herschel, John F. W. (John Frederick William), Sir, 1792-1871 · London : Longman, Brown, Green, Longmans, and Roberts · leaf 354
is entirely enclosed within theirs, and of comparatively small diameter. One only of them. Mars, exhibits any perceptible phase , and in its deficiency from a circular outline, never surpasses a moderately gibbous appearance, — the enlightened portion of the disc being never less than seven-eighths… … earth’s. The phases of Jupiter, Saturn, Uranus, and Nep¬ tune, being imperceptible, it follows that their orbits must include not only that of the earth, but of Mars also. (485.) All the superior planets are retrograde in their apparent motions when in opposition , and for some time before and…
Astronomy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-314-207.webp)