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A circle of finite radius has an infinitely distant directrix, while a pair of lines of finite separation have an infinitely distant focus. In mathematics , the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape.
The basic elements of Ptolemaic astronomy, showing a planet on an epicycle (smaller dashed circle), a deferent (larger dashed circle), the eccentric (×) and an equant (•). In both Hipparchian and Ptolemaic systems, the planets are assumed to move in a small circle called an epicycle , which in turn moves along a larger circle called a ...
Eccentric first appeared in English essays as a neologism in 1551, as an astronomical term meaning "a circle in which the earth, sun, etc. deviates from its center." (See Orbital eccentricity.) Five years later, in 1556, an adjective form of the word was used.
The mean eccentricity of an object is the average eccentricity as a result of perturbations over a given time period. Neptune currently has an instant (current epoch) eccentricity of 0.011 3, [13] but from 1800 to 2050 has a mean eccentricity of 0.008 59. [14]
The basic elements of Ptolemaic astronomy, showing a planet on an epicycle (smaller dashed circle), a deferent (larger dashed circle), the eccentric (×) and an equant (•). Equant (or punctum aequans) is a mathematical concept developed by Claudius Ptolemy in the 2nd century AD to account for the observed motion of the planets. The equant is ...
All of those perks mean that eccentric exercise may also prevent certain injuries (like muscle, when performed slowly and correctly) because it “makes muscles and joints more stable over time ...
(The Center Square) – After ranking among the most expensive states to raise a child, Washington wants to cut costs for parents, but one plan would put nearly $730 million at risk amid a massive ...
If you're already wondering when on god's green earth we're getting a season 4 of 'You', don't worry, you're not alone.