The wonders of the heavens, being a popular view of astronomy, including a full illustration of the mechanism of the heavens; embracing the sun, moon, and stars, with descriptions of the planets, comets, fixed stars, double stars, the constellations, the galaxy, or milky-way, the zodiacal light, aurora borealis, or norhtern lights, meteors, clouds, falling stars, aërolites, &c (1837)
Bradford, Duncan. [from old catalog] · Boston, American stationers company · leaf 221
h polar,spot. In the second figure, the south polar spothas a singular appearance, similar to what wasobserved by Maraldi. In consequence of its greatsplendor, it seems to project beyond the disc of theplanet, producing a break at c, increased by thegibbous appearance of the planet. The south… … centre of the circle marked 17 is placed on thecircumference of the inner circle, by making itsdistance from the centre of the circle marked 15answer to the interval of time between the twoobservations, properly calculated and reduced tosidereal measure. The same has been done withregard to the…
Astronomy
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