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- From the properties of the ellipse, A is the pericentre or nearest point of the orbit to the centre of attraction and B the
**apocentre**or most distant point. - To do this the actual speed in the orbit, and in a yet higher degree the angular speed around F, must be greatest at pericentre, and continually diminish till the
**apocentre**is reached. - From the law of angular motion of the latter its radius vector will run ahead of PQ near A, PQ will overtake and pass it at
**apocentre**, and the two will again coincide at pericentre when the revolution is completed. - It arises from the ellipticity of the orbit, is zero at pericentre and
**apocentre**, and reaches its greatest amount nearly midway between these points. - Apogee,
**Apocentre**, Aposaturnium, &c. are terms applied to those points of the orbit of a body moving around a.

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