SIMP. No: For the point would be changed, and would be
beneath the ſtar firſt obſerved.
beneath the ſtar firſt obſerved.
SAGR. You are in the right. Now like as that which in this
example anſwereth to the elevation of the Top-Gallant-Top, is
not the ſtar, but the point of the Firmament that lyeth in a right
line with the eye, and the ſaid top of the Maſt, ſo in the caſe
exemplified, that which in the Firmament anſwers to the Pole
of the Earth, is not a ſtar, or other fixed thing in the
ment; but is that point in which the Axis of the Earth
ed ſtreight out, till it cometh thither doth determine, which point
is not fixed, but obeyeth the mutations that the Pole of the
Earth doth make. And therefore Tycho, or who ever elſe that
did alledg this objection, ought to have ſaid that upon that
ſame motion of the Earth, were it true, one might obſerve ſome
difference in the elevation and depreſſion (not of the Pole, but)
of ſome fixed ſtar toward that part which anſwereth to our Pole.
example anſwereth to the elevation of the Top-Gallant-Top, is
not the ſtar, but the point of the Firmament that lyeth in a right
line with the eye, and the ſaid top of the Maſt, ſo in the caſe
exemplified, that which in the Firmament anſwers to the Pole
of the Earth, is not a ſtar, or other fixed thing in the
ment; but is that point in which the Axis of the Earth
ed ſtreight out, till it cometh thither doth determine, which point
is not fixed, but obeyeth the mutations that the Pole of the
Earth doth make. And therefore Tycho, or who ever elſe that
did alledg this objection, ought to have ſaid that upon that
ſame motion of the Earth, were it true, one might obſerve ſome
difference in the elevation and depreſſion (not of the Pole, but)
of ſome fixed ſtar toward that part which anſwereth to our Pole.
Upon the
al motion of the
Earth, alteration
may enſue in
ſome fixed ſtar,
not in the Pole.
al motion of the
Earth, alteration
may enſue in
ſome fixed ſtar,
not in the Pole.
SIMP. I already very well underſtand the miſtake by them
committed; but yet therefore (which to me ſeems very great) of
the argument brought on the contrary is not leſſened,
ſing relation to be had to the variation of the ſtars, and not of
the Pole; for if the moving of the Ship but 60. miles, make a
fixed ſtar riſe to me one degree, ſhall I not find alike, yea and
very much greater mutation, if the Ship ſhould ſail towards the
ſaid ſtar for ſo much ſpace as is the Diameter of the Grand
Orb, which you affirm to be double the diſtance that is between
the Earth and Sun?
committed; but yet therefore (which to me ſeems very great) of
the argument brought on the contrary is not leſſened,
ſing relation to be had to the variation of the ſtars, and not of
the Pole; for if the moving of the Ship but 60. miles, make a
fixed ſtar riſe to me one degree, ſhall I not find alike, yea and
very much greater mutation, if the Ship ſhould ſail towards the
ſaid ſtar for ſo much ſpace as is the Diameter of the Grand
Orb, which you affirm to be double the diſtance that is between
the Earth and Sun?
SAGR. Herein Simplicius, there is another fallacy, which,
truth is, you underſtand, but do not upon the ſudden think of
the ſame, but I will try to bring it to your remembrance: Tell
me therefore; if when after you have directed the Quadrant to
a fixed ſtar, and found v. g. its elevation to be 40. degrees,
you ſhould without ſtirring from the place, incline the ſide of
the Ouadrant, ſo as that the ſtar might remain elevated above
that direction, would you thereupon ſay that the ſtar had
red greater elevation?
truth is, you underſtand, but do not upon the ſudden think of
the ſame, but I will try to bring it to your remembrance: Tell
me therefore; if when after you have directed the Quadrant to
a fixed ſtar, and found v. g. its elevation to be 40. degrees,
you ſhould without ſtirring from the place, incline the ſide of
the Ouadrant, ſo as that the ſtar might remain elevated above
that direction, would you thereupon ſay that the ſtar had
red greater elevation?
The equivoke of
thoſe who believe
that in the annual
motion great
tations are to be
made about the
elevation of a
ed ſtar, is
ted.
thoſe who believe
that in the annual
motion great
tations are to be
made about the
elevation of a
ed ſtar, is
ted.
SIMP. Certainly no: For the mutation was made in the
ſtrument and not in the Obſerver, that did change place,
ving towards the ſame.
ſtrument and not in the Obſerver, that did change place,
ving towards the ſame.
SAGR. But if you ſail or walk along the ſurface of the
ſtrial Globe, will you ſay that there is no alteration made in the
ſaid Quadrant, but that the ſame elevarion is ſtill retained in
ſpect of the Heavens, ſo long as you your ſelf do not incline it,
but let it ſtand at its firſt conſtitution?
ſtrial Globe, will you ſay that there is no alteration made in the
ſaid Quadrant, but that the ſame elevarion is ſtill retained in
ſpect of the Heavens, ſo long as you your ſelf do not incline it,
but let it ſtand at its firſt conſtitution?
SIMP. Give me leave to think of it. I would ſay without
more ado, that it would not retain the ſame, in regard the
more ado, that it would not retain the ſame, in regard the