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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That the Earth may be a Planet.
bigneſs of the Orbs, and the time of their
Motions:
For then, next to the Sun, or
Centre, there will be the Sphere of Mercu-
ry;
which as it is but narrow in its Diame-
ter, ſo likewiſe is it quick in its Motion,
running its Courſe in eighty eight days:
Venus, that is next unto it, in 224 days:
The Earth in 365 days, or a Year:
Mars
in 687 days:
Jupiter in 4332 days: Saturn
in 10759 days.
Thus likewiſe is it with
thoſe Medicean Stars that encompaſs Jupi-
ter.
That which is loweſt amongſt them,
finiſhes his Courſe in two and twenty hours;

the next in three days and an half;
the third
in ſeven days;
and the fartheſt in ſeventeen
days.
Now as it is (according to Ariſto-
tle’s conſeſſion) more likely that Nature
ſhould obſerve ſuch a due proportion betwixt
the Heavenly Orbs;
ſo is it more probable,
that the Earth ſhould move, rather than the
Heavens.
Arg. 5. This may likewiſe be confirmed
from the appearance of Comets:
Concern-
ing which, there are three things common-
ly granted;
or if they were not, might be
eaſily proved:
namely,
1. That there are divers Comets in the
Air, betwixt the Moon and our Earth.
2. That many of theſe Comets do ſeem
to riſe and ſet as the Stars.
3. That this appearing Motion is not pro-
perly their own, but communicated unto
them from ſomewhat elſe.

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