PERIOD OF ROTATION
The period of rotation of an orbiting body is the time it takes for it to make one rotation around its axis. The period of rotation for the Earth is one day.
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Period of rotation (w/ respect to the Sun)
24h 00m 00s
Inclination of equator to orbit ...
Pluto's period of rotation is 6.4 days, which is the same as its moon Charon.
What is the period of rotation for Uranus and Neptune?
What is the period of rotation for Jupiter and Saturn?
Which planet is smallest?
Which planet is largest?
Which planet is furthest from the sun?
Which planet is closest to the sun ...
* The Sun's period of rotation at the surface varies from approximately 25 days at the equator to 36 days at the poles. Deep down, below the convective zone, everything appears to rotate with a period of 27 days.
Eclipse & Sun Movies ...
Because of the precession of the equinoxes, the sidereal day thus defined is slightly less than the period of rotation with respect to the stars, but the difference is less than 0.01 second.
It was long thought that Mercury's period of rotation on its axis was identical to its period of revolution, so that the same side of the planet always faced the sun. However, radar studies in 1965 showed a period of rotation of 58.6 days.
Based on the movements of Saturnian storm clouds, the period of rotation of the atmosphere near the equator is about 10 hr 11 min.
Note: The text above--and sections that follow--gives the period of rotation of the Earth as 24 hours. That is not exactly true: 24 hours is the mean length of a solar day, the average time that passes from noon to the next noon.
No asteroid with a diameter larger than 100 metres has a period of rotation of less than 2.2 hours.
In the simplest instance, the period of rotation for the two bodies and the orbital period eventually become exactly equal because of this tidal coupling (and as a result, ...
Its period of rotation and the inclination of its axis are similar. Its density indicates it's made of rocky materials, although with less iron and more lightweight elements and volatiles than the Earth.
Sol: A local day on a planet, defined by its period of rotation. On Mars, for example, a local day lasts 24 hours and 37 minutes.
Uranus also has a short period of rotation, just above 17 hours, which has flattened the planet considerably, making it more elliptical than most planets. The equatorial circumference is about 2.4 % greater than the polar circumference.
Due to the fact that the Moon's period of rotation and revolution are the same, we always see the same side of the Moon from Earth.
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A period of rotation of a satellite about its axis that is the same as the period of its orbit around its primary. This causes the satellite to always keep the same face to the primary. Our Moon is in synchronous rotation around the Earth.
Synchronous Rotation - Rotation for which the period of rotation is equal to the period of revolution. An example of synchronous rotation is the Moon, for which the period of rotation and the period of revolution about the Earth are both 1 month ...
synchronous orbit State of an object when its period of rotation is exactly equal to its average orbital period. The Moon is in synchronous orbit, and so presents the same face toward Earth at all times.
Geosynchronous Orbit The orbit of a satellite in which the orbital period of the satellite is equal to Earth's period of rotation.
sidereal period: The period of rotation or revolution of an astronomical body referred to the stars.
singularity: The object of zero radius into which the matter in a black hole is believed to fall.
42 hours (half of the Moon's synodic period of rotation), which is considerably less than the natural period of the oceans, complex resonance phenomena take place.
This is because we define a day not based on the Earth's period of rotation, but based on the average time from noon one day to noon the next.
ephemeris ~: [ET] 'scientific time' - used between 1960 and 1983, this uniform timescale was based on the ephemeris second, itself derived from the period of rotation of the Earth at a particular date.
When Sedna was discovered, astronomers used a 1.3-metre telescope to observe the planetoid's period of rotation, concluding it rotated once every 20 days - an abnormally slow rate which they attributed to the gravitational tugs of a moon.
This idea gained support from the apparent similarity of the dimensions of Pluto and Triton and the near coincidence in Triton's period of revolution (5.9 days) and Pluto's period of rotation (6.4 days).
The length of time (23h56m4s.091) between two successive meridian transits of the vernal equinox (cf. mean solar day). Because of precession the sidereal day is about 0.0084 second shorter than the period of rotation of Earth relative to a fixed ...
to be spun up to the critical spin rate by the YORP effect in a time on the order of a few tens of million years," explains Pravec, who tells Astronomy Now that for a range of estimated asteroid bulk densities, the critical period of rotation ...
Venus Period of Rotation
Venus Conjunction
Occultation of Venus
Sun and Venus
Venus Retrograde 2009
Venus Retrograde 2010
Who Discovered Venus?
Evening Star
How Long Does It Take Venus to Orbit the Sun?
When Was Venus Discovered?
 See also: Period, Rotation, Earth, Sun, Solar
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