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Instead of this being the case, the axis of rotation of the earth is tipped so that the angle between the equator and the elliptic is 23-1/2°." "I seem to remember something of the sort from my school days." "This angle of tilt may be assumed to be constant, for I won't bother with the precessions, nutations and other minor movements considered in accurate computations.
That of 1781 contains De la Caillie's catalogue of fixed stars reduced to the commencement of that year, and a table of the aberrations and nutations of the principal stars. 1784 contains the same catalogue with the nébuleuses of Messier. 1785 contains the famous catalogue of Flamsteed, with the positions of the stars reduced to the beginning of the year 1784, and which supersedes the use of that immense book. 1786 gives you Euler's lunar tables corrected; and 1787, the tables for the planet Herschel.
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