Astronomia Britannica exhibiting the doctrine of the sphere, and theory of the planets decimally by trigonometry, and by tables : fitted for the meridian of London ... / by John Newton ...
About this Item
Title
Astronomia Britannica exhibiting the doctrine of the sphere, and theory of the planets decimally by trigonometry, and by tables : fitted for the meridian of London ... / by John Newton ...
Author
Newton, John, 1622-1678.
Publication
London :: Printed for the author by R. and W. Leybourn, and are to be sold by Thomas Piercepoint ...,
1657.
Rights/Permissions
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Subject terms
Astronomy -- Early works to 1800.
Planetary theory -- Early works to 1800.
Astronomy -- Mathematics -- Early works to 1800.
Link to this Item
http://name.umdl.umich.edu/A52255.0001.001
Cite this Item
"Astronomia Britannica exhibiting the doctrine of the sphere, and theory of the planets decimally by trigonometry, and by tables : fitted for the meridian of London ... / by John Newton ..." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A52255.0001.001. University of Michigan Library Digital Collections. Accessed May 30, 2025.
Pages
Example.
The Suns meane longitude
421. 67681
Aequation adde
1 14942
The Suns true place
422. 82623
or 2 Signes 2 degrees 82623 parts of a degree
Lastly, to find his distance from the earth, I say,
As the sine of M B H
1. 14942 co▪ ar.
1. 6977118
Is to the side M H
3568
3. 5524249
So is the sine of B M H
34. 78541
9. 7562590
To the side B H
5. 0063957
or distance required
101483
Thus we have found the Suns place by calculation, we will now shew how to reduce the Suns mean longitude to his true, by the Table of Ae∣quations of the Suns excentrick.
The Suns Anomaly in this example is
325. 21459
The Aequation of 325 is
1. 15566
326
1. 12648
Difference is
02918
Now then I say if one deg. co. ar.
5.
Give 2918
3. 4650853
What shall 21459
4. 3316095
The answer is 6••6
2. 7966948
descriptionPage 97
Aequation of 325 deg.
1. 15566
Part proportional subt.
626
Aequation equated
1. 14940
The Snns mean longitude
61. 67681
Aequation adde
1. 14940
Suns true place
62. 82621
And in like manner the Logarithme of the Suns distance from the Earth will be found to be 5. 0063633, which being more necessary then the di∣stance it self, in the calculation of the places of the other planets, we have as most convenient placed in the table.
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