Herschel, John F. W. (John Frederick William), Sir, 1792-1871 · London : Longman, Brown, Green, Longmans, and Roberts · leaf 462
ach are presented to each other and to S in all possible configurations, the node of P’s orbit will always advance on M’s when both bodies are on the same side of the line of nodes, and recede when on the opposite. They will therefore, on an average, advance and recede during equal times (supposing… … would merely oscillate to and fro about a mean position, without any permanent motion in either direction. But this is not the case. The rapidity of their recess in every position favourable to recess is greater than that of their advance in the corresponding opposite position. To show this, let us…
Astronomy
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