Period of Revolution


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Period of Revolution

 

in astronomy, the interval of time in which a celestial body completes one full revolution in its orbit, one of the elements of an orbit. Depending on the point chosen to mark the beginning of each revolution, various types of periods are distinguished. Two of these types are the nodical period, which marks the beginning of each revolution of the celestial body in its orbit as the ascending node, and the anomalistic period, which has as its starting point for bodies orbiting the sun the perihelion and for those orbiting the earth the perigee. Because orbits are continuously changing owing to perturbations, periods of revolution of the same body, measured from different starting points, may differ somewhat. In the case of an unperturbed orbit, all the periods are equal.

References in periodicals archive ?
They edited, cut and improvised from existing Aleichem plays, "and came up with something distinctly their own, suited for a period of revolution and Great Depression.
One of the ways that this is achieved is by overthrowing the easy equation of women with domesticity, and recognizing that Irish women novelists of this period of revolution and reform used the novel (a putative 'feminine' genre) to comment on issues traditionally assigned to the masculine, public sphere, among them history and politics.
And Murphy and Owen's departure has made it obvious we'renow observing a period of revolution, not evolution.
Westerners know relatively little about life in China during the period of revolution and the Communist takeover in the first half of the 20th century.