1motion ſtraight forwards, it goeth to the matutine conjunction;
and moreover it being true, that when it appeareth bigge it ſhews
with a corniculate figure, and when it appeareth little, it ſeems
perfectly round, theſe appearances, I ſay, being true, I do not ſee
how one can chooſe but affirm the ſaid ſtar to revolve in a circle
bout the Sun, for that the ſaid circle cannot in any wiſe be ſaid
to encompaſſe or to contain the Earth within it, nor to be
our to the Sun, that is between it and the Earth, nor yet
riour to the Sun. That circle cannot incompaſſe the Earth,
cauſe Venus would then ſometimes come to oppofition with the
Sun; it cannot be inferiour, for then Venus in both its
ons with the Sun would ſeem horned; nor can it be ſuperiour,
for then it would alwayes appear round, and never cornicular;
and therefore for receit of it I will draw the circle CH, about
the Sun, without encompaſſing the Earth.
and moreover it being true, that when it appeareth bigge it ſhews
with a corniculate figure, and when it appeareth little, it ſeems
perfectly round, theſe appearances, I ſay, being true, I do not ſee
how one can chooſe but affirm the ſaid ſtar to revolve in a circle
bout the Sun, for that the ſaid circle cannot in any wiſe be ſaid
to encompaſſe or to contain the Earth within it, nor to be
our to the Sun, that is between it and the Earth, nor yet
riour to the Sun. That circle cannot incompaſſe the Earth,
cauſe Venus would then ſometimes come to oppofition with the
Sun; it cannot be inferiour, for then Venus in both its
ons with the Sun would ſeem horned; nor can it be ſuperiour,
for then it would alwayes appear round, and never cornicular;
and therefore for receit of it I will draw the circle CH, about
the Sun, without encompaſſing the Earth.
Venus very greas
towards the
ctive conjunction
and very ſmall
wards the
tine.
towards the
ctive conjunction
and very ſmall
wards the
tine.
Venus
rily proved to move
about the Sun.
rily proved to move
about the Sun.
SALV. Having placed Venus, it is requiſite that you think of
Mercury, which, as you know, alwayes keeping about the Sun,
doth recede leſſe diſtance from it than Venus; therefore conſider
with your ſelf, what place is moſt convenient to aſſign
Mercury, which, as you know, alwayes keeping about the Sun,
doth recede leſſe diſtance from it than Venus; therefore conſider
with your ſelf, what place is moſt convenient to aſſign
The revolution of
Mercury concluded
to be about the Sun,
within the Orb of
Venus.
Mercury concluded
to be about the Sun,
within the Orb of
Venus.
SIMP. It is not to be queſtioned, but that this Planet
ing Venus, the moſt commodious place for it will be, a leſſer
cle within this of Venus, in like manner about the Sun, being
that of its greateſt vicinity to the Sun, an argument, an evidence
ſufficiently proving the vigour of its illumination, above that of
Venus, and of the other Planets, we may therefore upon theſe
conſiderations draw its Circle, marking it with the Characters
BG.
ing Venus, the moſt commodious place for it will be, a leſſer
cle within this of Venus, in like manner about the Sun, being
that of its greateſt vicinity to the Sun, an argument, an evidence
ſufficiently proving the vigour of its illumination, above that of
Venus, and of the other Planets, we may therefore upon theſe
conſiderations draw its Circle, marking it with the Characters
BG.
Mars neceſſarily
includeth within its
Orb the Earth, and
alſo the Sun.
includeth within its
Orb the Earth, and
alſo the Sun.
SALV. But Mars, Where ſhall we place it?
SIMP. Mars, Becauſe it comes to an oppoſition with the Sun,
its Circle muſt of neceſſity encompaſs the Earth; But I ſee that it
muſt neceſſarily encompaſs the Sun alſo, for coming to
on with the Sun, if it did not move over it, but were below it, it
would appear horned, as Venus and the Moon; but it ſhews
wayes round, and therefore it is neceſſary, that it no leſs includ
its Circle muſt of neceſſity encompaſs the Earth; But I ſee that it
muſt neceſſarily encompaſs the Sun alſo, for coming to
on with the Sun, if it did not move over it, but were below it, it
would appear horned, as Venus and the Moon; but it ſhews
wayes round, and therefore it is neceſſary, that it no leſs includ
eth the Sun within its circle than the Earth. And becauſe I
member that you did ſay, that when it is in oppoſition with the
Sun, it ſeems 60 times bigger than when it is in the conjunction,
me thinks that a Circle about the Centre of the Sun, and that
eth in the earth, will very well agree with theſe Phænomena,
which I do note and mark D I, where Mars in the point D, is near
to the earth, and oppoſite to the Sun; but when it is in the point
I, it is at Conjuction with the Sun, but very far from the Earth.
And becauſe the ſame appearances are obſerved in Jupiter and
Saturn, although with much leſſer difference in Jupiter than in
Mars, and with yet leſſe in Saturn than in Jupiter; me thinks I