Astronomy Explained Upon Sir Isaac Newton's Principles: And made easy to those who have not studied mathematicsFerguson, James
Science
Astronomy Explained Upon Sir Isaac Newton's Principles: And made easy to those who have not studied mathematics
Ferguson, James
Astronomy -- Early works to 1800
| 4 | 118 2 56 | 3 26 26| 3 13 16 | 4 2 41 | 3 26 26 | 0 6 15 |
| 5 | 147 15 4 | 4 25 32| 4 9 5 | 5 3 21 | 4 25 32 | 0 7 49 |
+----------+-----------+----------+----------+----------+----------+----------+
| 6 | 177 4 24 | 5 24 38 | 5 4 54 | 6 4 1 | 5 24 38 | 0 9 23 |
| 7 | 206 17 8 | 6 23 44 | 6 0 43 | 7 4 42 | 6 23 45 | 0 10 57 |
| 8 | 236 5 52 | 7 22 50 | 6 26 32 | 8 5 22 | 7 22 51 | 0 12 31 |
| 9 | 265 18 36 | 8 21 57 | 7 22 21 | 9 6 2 | 8 21 58 | 0 14 4 |
| 10 | 295 7 21 | 9 21 3 | 8 18 10 | 10 6 42 | 9 21 4 | 0 15 38 |
+----------+-----------+----------+----------+----------+----------+----------+
| 11 | 324 20 5 | 10 20 9 | 9 13 59 | 11 7 22 | 10 20 10 | 0 17 12 |
| 12 | 354 8 49 | 11 19 16 | 10 9 48 | 0 8 3 | 11 19 17 | 0 18 46 |
| 13 | 383 21 33 | 0 18 22 | 11 5 37 | 1 8 43 | 0 18 23 | 0 20 20 |
+----------+-----------+----------+----------+----------+----------+----------+
The first, second, third, and fourth Tables may be continued, by means
of the sixth, to any length of time: for, by adding 12 Lunations to the
mean time of the New or Full Moon which happens next after the 11th day
of _March_, and then, casting out 365 days in common years, and 366 days
in leap-years, we have the mean time of New or Full Moon in _March_ the
following year. But when the mean New or Full Moon happens on or before
the 11th of _March_, there must be 13 Lunations added to carry it to
_March_ again. The Anomalies, Sun’s distance from the Node, and
Longitude of the Sun, are found the same way, by adding them for 12 or
13 Lunations. But the retrograde Motion of the Node for these Lunations
must be subtracted from it’s longitude from Aries in _March_, to have
it’s Longitude or Place in the _March_ following.
Public-domain text, read in full here on John Shaqi.
Astronomy Explained Upon Sir Isaac Newton's Principles: And made easy to those who have not studied mathematics — John Shaqi
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