An epitome of astronomy, with the new discovered planets, and the late comet, as illustrated by the eidouranion; or, transparent orrery / originally invented by A. Walker, and as lectured upon by his son, D.F. Walker.

  • Adam Walker
Date:
1818
Catalogue details

Licence: Public Domain Mark

Credit: An epitome of astronomy, with the new discovered planets, and the late comet, as illustrated by the eidouranion; or, transparent orrery / originally invented by A. Walker, and as lectured upon by his son, D.F. Walker. Source: Wellcome Collection.

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    Moon during its exhibition, particularly by an unique planisphere, made from a telescope of the largest magnifying power, and laid down with the most minute correctness by the late Mr. Russel, with a map of the appearance of the Earth as seen from the Moon, indicating from their appearance, that they are worlds of nearly similar construction. In the thirteen revolutions she will make while the Earth travels round the Sun, it will evidently appear that the Earth is a Moon to her, but appear¬ ing thirteen times as large as the Moon to us; that she does not shine by her own light; that she has no diversity of seasons ; that she keeps the same side always towards the Earth, and therefore turns on her axis every twenty-nine days and a half; that her surface is mountainous :* and that she shines without setting, every second fortnight, on the arctic ©r antarctic parts of our globe, during winter: a * Her mountains by some have been calculated nine miles high; but Dr. Herschell’s Telescopes, which magnify 6500 times, have reduced her highest lulls to about two miles. Mr. Sbroeter indeed apprehends that the mountain Leibnitz, is not less than 25,000 feet high, and the Craters of the Moon to be from 4 to 15 miles diameter. He discovers some new spots on the Moon, and calculates her atmosphere to be only about one mile high, an height so inconsiderable, that it might escape our best telescope® or most minute observations.
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