Wilkins, John, A discovery of a new world : or a discourse tending to prove, that 'tis probable there may be another Habitable World in the Moon ; with a discourse concerning the Probability of a Passage thither; unto which is added, a discourse concerning a New Planet, tending to prove, that 'tis probable our earth is one of the Planets

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128116That the Moon may be a World. by the ſame reaſon, may a brighter Vapour
be the cauſe of theſe appearances.
But how probable ſoever this Opinion may
ſeem, yet if well conſider’d, you ſhall find it
altogether abſurd and impoſſible:
1. Theſe Stars were never ſeen there before,
and ’tis not likely, that a Vapour being hard
by us, can ſo multiply that Light, which could
not before be at all diſcern’d.
2. This ſuppos’d Vapour cannot be either
contracted into a narrow compaſs, or dilated
into a broad.
1. It could not be within a little
ſpace, for then that Star would not appear
with the ſame multiplyed Light to thoſe in
other Climates.
2. It cannot be a dilated Va-
pour, for then other Stars which were diſcer-
ned through the ſame Vapour, would ſeem as
big as that;
this Argument is the ſame in ef-
fect, with that of the Paralax, as you may ſee
in this Figure.
5[Figure 5]
Suppoſe AB to be a Hemiſphere of one
Earth, CD to be the upper part of the high-
eſt Region, in which there might be either a
contracted Vapour, as G, or elſe a dilated one;

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