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The true anomaly is usually denoted by the Greek letters ν or θ, or the Latin letter f, and is usually restricted to the range 0–360° (0–2π rad). The true anomaly f is one of three angular parameters (anomalies) that defines a position along an orbit, the other two being the eccentric anomaly and the mean anomaly.
In astronomy, an anomaly of an elliptical orbit, generally measured with respect to an apsis, usually the periapsis Anomalous precession , another term for "apsidal precession" Eccentric anomaly , an intermediate value used to compute the position of a celestial object as a function of time
Shown are mean anomaly and true anomaly for two units of time. (Note that for visual simplicity, a non-overlapping circular orbit is diagrammed, thus this circular orbit with same orbital period is not shown in true scale with this elliptical orbit: for scale to be true for the two orbits of equal period, these orbits must intersect.)
A bootstrap paradox, also known as an information loop, an information paradox, [6] an ontological paradox, [7] or a "predestination paradox" is a paradox of time travel that occurs when any event, such as an action, information, an object, or a person, ultimately causes itself, as a consequence of either retrocausality or time travel.
Gravity anomaly, difference between the observed gravity and a value predicted from a model Bouguer anomaly, anomaly in gravimetry; Free-air anomaly, gravity anomaly that has been computed for latitude and corrected for elevation of the station; Iridium anomaly, an unusual abundance of what is normally a very rare element in the Earth's crust
Charles Hoy Fort (August 6, 1874 – May 3, 1932) was an American writer and researcher who specialized in anomalous phenomena.The terms "Fortean" and "Forteana" are sometimes used to characterize various such phenomena.
The evidence for this statement has been accumulating for more than a century. Studies of benign hallucinatory experiences go back to 1886 and the early work of the Society for Psychical Research, [2] [3] which suggested approximately 10% of the population had experienced at least one hallucinatory episode in the course of their life. More ...
The true anomaly is the angle labeled in the figure, located at the focus of the ellipse. It is sometimes represented by f or v. The true anomaly and the eccentric anomaly are related as follows. [2] Using the formula for r above, the sine and cosine of E are found in terms of f :