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sidereal period
(redirected from Orbital period)

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sidereal period

Orbital period of a planet around the Sun, or a moon around a planet, with reference to a background star. The sidereal period of a planet is in effect a ‘year’ for that planet. A synodic period is a full circle as seen from Earth; for example, the period from new moon to new moon is the Moon's synodic period.
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If this is indeed the orbital period of a stellar companion, then it's likely a giant or supergiant star between three and five times the Sun's mass," Strohmayer said.
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Which means that if you make an observation over a year, you expect a change in the orbital period of a few parts per million.
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The squares of the orbital periods of planets are directly proportional to the cubes of the major axis (half the "length" of the ellipse) of the orbits.
What Is Gravity? by prashant vashiyar / Political science community
 
 
 
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