Philosophical Transactions of the Royal Society - Vol 1 - 1666: Giving some Accompt of the present Undertakings, Studies, and Labours of the Ingenious in many considerable parts of the WorldVarious
History
Philosophical Transactions of the Royal Society - Vol 1 - 1666: Giving some Accompt of the present Undertakings, Studies, and Labours of the Ingenious in many considerable parts of the World
Various
Science -- Periodicals
He continueth, and saith, that this _Comet_ shall not arrive to the place
over against the _Line_ of _Pisces_ till the 10 of _February_, & that then
its _Diurnal_ motion shall not exceed 8 minutes, and not 5 minutes about
the 20 of the same month: and that in the {6} beginning of _March_, if we
see it so long, the said motion shall not exceed 4 minutes, and so shall be
still diminishing; except the _Comet_ become _Retrograde_, which, as very
important, he would have well observed; as also, whether its motion will be
about the end more or less swift, than he hath calculated it.
He subjoyneth, that the greatest way, which this Star could make in 24.
hours, hath been 13. d. 25'; and in one houre, about 34'; and thinking it
probable, that about the time, when it made so much way, it should be
nearest to the _Earth_, he concludeth that its motion in 24. hours must be,
in its least distance from the _Earth_, as about 3. to 14, or 1. to 4-2/3,
and that its motion in one hour was to be to the same least distance, as
about 1. to 102-1/7.
But that, which he judgeth most remarkable, is, that he found by his
Calculation, that the said least distance should be on the 29. of
_December_, when the _Comet_ was opposite to the Sun; which he does not
know whether it may not serve to decide the grand Question concerning the
_Motion of the Earth_.
He taketh further notice, that the _Tayl_ of the _Comet_ was to turn
_Westward_, with a point to the _North_, until the 29. of _December_, at
which time it was to be opposite to the _Sun_, and that then the said
_Tayl_ was to look directly _North_; but that, after that time, the _Tayl_
was to turn _Eastward_, and continue to do so, until it disappear; and that
it shall draw a little towards the _North_, until the 8. or 10. of
_February_, at which time the _Tayl_ is to be parallel to the _AEquator_, as
if the _Comet_ be _yet_ seen for some time after, the _Tayl_ shall go a
little lower towards the _South_, but grow smaller.
He finds by his _Hypothesis_, that on the 2. of _December_, which is the
first observation, that he hath heard of, this Star was to be about 7.
times more remote from the _Earth_, than when it was in its _Perigeum_; and
that it will be again in an equall remoteness from the _Earth_, on the 27.
of _January_, so that he is of opinion, that in case this _Comet_ have not
been seen before the 2. of _December_, it will not be seen any more after
the 27. of _January_.
Public-domain text, read in full here on John Shaqi.
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