The line joining a planet with the centre of its orbital area.
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http://jot101.com/2015/05/a-z-of-science-fiction-words/
• (n.) An ideal straight line joining the center of an attracting body with that of a body describing an orbit around it, as a line joining the sun and a planet or comet, or a planet and its satellite. • A straight line (or the length of such line) connecting any point, as of a curve, with a fixed point, or pole, round which the straig......
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http://thinkexist.com/dictionary/meaning/radius_vector/
The line joining an orbiting body to its center of motion at any instant, directed radially outward. For a circular orbit, the center of motion coincides with the center of the circle; for a parabolic or hyperbolic orbit, the center of motion is the focus, and for an elliptical orbit it is one of th...
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http://www.daviddarling.info/encyclopedia/R/radius_vector.html
1. <mathematics> A straight line (or the length of such line) connecting any point, as of a curve, with a fixed point, or pole, round which the straight line turns, and to which it serves to refer the successive points of a curve, in a system of polar coordinates. See Coordinate. ... 2. <astronomy> An ideal straight line joining the cen...
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http://www.encyclo.co.uk/local/20973
Ra'di·us vec'tor (vĕk'tŏr).
1. (Math.) A straight line (or the length of such line) connecting any point, as of a curve, with a fixed point, or pole, round which the straight line turns, and to which it serves to refer the successive points of a curve, in a system of polar coördinates. See
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Found on http://www.encyclo.co.uk/webster/R/5
[n] - a line connecting a satellite to the center of the body around which it is rotating 2. [n] - a line connecting a point in space to the origin of a polar coordinate system
Found on http://www.webdictionary.co.uk/definition.php?query=radius%20vector
noun a line connecting a point in space to the origin of a polar coordinate system
Found on https://www.encyclo.co.uk/local/20974
No exact match found.
