- sidereal rotation
- астр. сидерическое вращение
Englsh-Russian aviation and space dictionary. - M.: Military publishing house USSR Ministry of Defence. edited by M. Murashkevich. 1974.
sidereal rotation
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Sidereal time — is a measure of the position of the Earth in its rotation around its axis, or time measured by the apparent diurnal motion of the vernal equinox, which is very close to, but not identical to, the motion of stars. They differ by the precession of… … Wikipedia
sidereal day — n. the time between two successive passages of the vernal equinox across the meridian: it measures one rotation of the earth and equals 23 hours, 56 minutes, 4.1 seconds of mean solar time … English World dictionary
Rotation period — The rotation period of an astronomical object is the time it takes to complete one revolution around its axis of rotation relative to the background stars. It differs from the planet s solar day, which includes an extra fractional rotation needed … Wikipedia
Sidereal year — The sidereal year is the time taken for the Sun to return to the same position with respect to the stars of the celestial sphere. It is the orbital period of Earth, equal to 365.25636042 mean solar days (31,558,149.540 seconds), that is… … Wikipedia
sidereal day — a unit of time used in astronomy, equal to the period of time in which the earth makes one rotation relative to the stars. If we could view the earth from outside the Solar System, we would see that it actually completes 366.242 rotations… … Dictionary of units of measurement
sidereal day — noun the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day • Syn: ↑day • Hypernyms: ↑time unit, ↑unit of time, ↑sidereal time … Useful english dictionary
Sidereal Day — The true rotation period of a planet, determined by the time between appearances of a star in the same place in the sky. Since the rotation of the Earth is gradually slowing down, a day in the past was shorter than now, and in the future it… … The writer's dictionary of science fiction, fantasy, horror and mythology
sidereal time — noun Time measured by the apparent diurnal motion of the vernal equinox; approximated by that based on the rotation of the Earth relative to the stars … Wiktionary
Solar rotation — can vary because the sun is composed of a gaseous plasma, and therefore may lack a fixed rotation rate. The rate of rotation is observed to be fastest at the equator (latitude φ=0 deg), and to decrease as latitude increases. The rotation rate is… … Wikipedia
Carrington rotation — The Carrington rotation of the Sun is a system for comparing locations on the Sun over a period of time, allowing the following of sunspot groups or reappearance of eruptions at a later time.Because the Solar rotation is variable with latitude,… … Wikipedia
Differential rotation — is seen when different parts of a rotating object move with different angular velocities (rates of rotation) at different latitudes and/or depths of the body and/or in time. This indicates that the object is not solid. In fluid objects, such as… … Wikipedia
