Solar rotation varies with latitude. The Sun is not a solid body, but is composed of a gaseous plasma. Different latitudes rotate at different periods...

Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space...

rotation period or solar day) is the period for a celestial object to rotate once in relation to the star it is orbiting, and is the basis of solar time...

used "rotation period" is the object's synodic rotation period (or solar day), which may differ, by a fraction of a rotation or more than one rotation, to...

shearing. Galaxies and protostars usually show differential rotation; examples in the Solar System include the Sun, Jupiter and Saturn. Around the year...

synodic rotation period. Traditionally, there are three types of time reckoning based on astronomical observations: apparent solar time and mean solar time...

Furthermore, its rate of rotation varies with latitude, rotating faster at the equator than at the poles. In observations of the solar disk, cardinal directions...

the rotation of Earth, so do the stars. Both solar time and sidereal time make use of the regularity of Earth's rotation about its polar axis: solar time...

of TSI changes on solar rotational and solar cycle timescales is the varying photospheric coverage of these radiatively active solar magnetic structures...

uses sunspot observations to demonstrate the rotation of the Sun 1619 — Johannes Kepler postulates a solar wind to explain the direction of comet tails...

Rotation or rotational motion is the circular movement of an object around a central line, known as an axis of rotation. A plane figure can rotate in...

regions Letters on Sunspots List of solar cycles Radio propagation Solar cycle Solar rotation Space weather Spörer's law (predictive) Starspot Wolf number sunspot...

on either side of the solar magnetic equator, a thin current sheet is formed in the solar wind. At great distances, the rotation of the Sun twists the...

currently used nearly everywhere in the world, is a solar calendar based on the angle of the Earth's rotational axis relative to its local star, the Sun. The...

160-minute solar cycle Coronal seismology Differential rotation Diskoseismology Frequency separation Magnetogravity wave Moreton wave Solar neutrino problem...

change in its rotation rate over the course of a complete orbit. In the case where a tidally locked body possesses synchronous rotation, the object takes...

described. The direction of rotation is determined by an inertial frame of reference, such as distant fixed stars. In the Solar System, the orbits around...

A solar tracker is a device that orients a payload toward the Sun. Payloads are usually solar panels, parabolic troughs, Fresnel reflectors, lenses, or...

Solar physics as a whole, however, he prudently excluded from his field of view. He limited his task to fixing the true period of the Sun's rotation (of...

A solar cooker is a device which uses the energy of direct sunlight to heat, cook or pasteurize drink and other food materials. Many solar cookers currently...

The coin rotation paradox is the counter-intuitive math problem that, when one coin is rolled around the rim of another coin of equal size, the moving...

name for SOLAR may be Solar Monitoring Observatory or SMO. In 2012, the entire 450-tonne station was rotated so SOLAR could observe a full rotation of the...

Sánchez-Bajo F, Gallego MC (2002). "A Measure of the Solar Rotation During the Maunder Minimum". Solar Physics. 207 (2): 219–222. Bibcode:2002SoPh..207....

Neptune, the other giant planets in the Solar System, are less oblate. The combination of the bulge and the rotation rate means that the effective surface...

Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the...

values of ΔT and so of Earth's rotation. : Equation 11.132  The following factors determine the duration of a total solar eclipse (in order of decreasing...

51.447. "Solar system". Merriam Webster Online Dictionary. 2008. Retrieved 2008-04-15. Michael Mark Woolfson (1984). "Rotation in the Solar System". Philosophical...

Time (UT or UT1) is a time standard based on Earth's rotation. While originally it was mean solar time at 0° longitude, precise measurements of the Sun...

of time is the discovery that the rate of rotation of the earth, or equivalently, the length of the mean solar day, is not constant. William Ferrel in 1864...

axes through their centres. A planet's rotation period is known as a stellar day. Most of the planets in the Solar System rotate in the same direction as...