The secular acceleration is now attributed to tidal effects, which had not been considered in the earlier studies.
2.
He only published an article on the secular acceleration of the Moon in 1880 and one on Jupiter s Great Red Spot ( 1912 ).
3.
Ibn Yunus's observations on conjunctions and eclipses were used in Richard Dunthorne and Simon Newcombs'respective calculations of the secular acceleration of the moon.
4.
Small terms integrated in time come to have large effects and Adams concluded that Plana had overestimated the secular acceleration by approximately 1.66 " per century.
5.
This'secular acceleration'could not be explained by gravitational theory alone, and it had been suggested by Simon Newcomb that it was in fact due to a gradual deceleration of the Earth's rate of rotation, due to friction generated by the tides.
6.
Nonetheless, Sharpless's work stands as the first useful calculation of Phobos's secular acceleration . ( His calculations for Deimos, conversely, were deemed " barely significant " due to their high systematic error . ) Both Sharpless and Shklovsky have craters on Phobos named in their honor.
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