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What is this 877-year cycle in the orbits of Jupiter & Saturn, and this multimillion-year cycle in the lunar orbit?
The book The Theory That Would Not Die (by Sharon Bertsch McGrayne, 2011) states the following on page 28:
He [Pierre-Simon Laplace] used other methods between 1785 and 1788 to determine that Jupiter ...
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1
vote
1
answer
218
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What should I improve my telescope kit to see more details of Moon?
What should I improve my telescope kit to see more details of Moon?
I have the gskyer telescope of 60mm aperture and 350mm focal length.
my eyepieces are 10mm,25mm.
and I have x3 Barlow.
my best ...
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