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...

west due to 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:...

spin axis can be called a pole; for example, Earth's rotation defines the geographical poles. A rotation around an axis completely external to the moving...

the rotation of the Earth. Other services of IERS are at the Paris Observatory. UT1 is the non-uniform time defined based on the Earth's rotation. It...

177° ("upside down") and rotates prograde. Earth's orbital plane is known as the ecliptic plane, and Earth's tilt is known to astronomers as the obliquity...

water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is land, most...

its rotation period (lunar day) are synchronized at 29.5 days by Earth's gravity pulling on the Moon. This makes the Moon tidally locked to Earth, always...

lies close to the plane of Earth's orbit around the Sun (the ecliptic), rather than in the plane of the Earth's rotation (the equator) as is usually...

physicist Léon Foucault, conceived as an experiment to demonstrate the Earth's rotation. If a long and heavy pendulum suspended from the high roof above a...

of gravitation (from mass distribution within Earth) and the centrifugal force (from the Earth's rotation). It is a vector quantity, whose direction coincides...

decreased Earth's rotational velocity, affecting UTC adjustments and causing problems for computer networks that rely on UTC. Earth's rotational speed is...

20% of Earth's radius or 70% of the Moon's radius. There are no samples of the core accessible for direct measurement, as there are for Earth's mantle...

ellipsoid, including the tallest mountains and deepest oceanic trenches. Earth's rotation also affects the sea level, the imaginary surface used as a reference...

locking between Earth and the Moon. The length of Earth's day would increase and the length of a lunar month would also increase. Earth's sidereal day would...

DT) is a measure of the cumulative effect of the departure of the Earth's rotation period from the fixed-length day of International Atomic Time (86,400...

variation of latitude is a small deviation in the Earth's axis of rotation relative to the solid earth, which was discovered by and named after American...

1 ms to Earth's stellar day given in mean solar time to account for the length of Earth's mean solar day in excess of 86400 SI seconds. Rotation period...

time Earth has traveled 940 million km (584 million mi). Ignoring the influence of other Solar System bodies, Earth's orbit, also called Earth's revolution...

than 360° of rotation because of the Earth's revolution around the Sun. With a full year being slightly more than 360 days, the Earth's daily orbit around...

February 2011). "Reconciling the Hemispherical Structure of Earth's Inner Core With its Super-Rotation". Nature Geoscience. 4 (4): 264–267. Bibcode:2011NatGe...

altitude above Earth's equator, 42,164 km (26,199 mi) in radius from Earth's center, and following the direction of Earth's rotation. An object in such...

Polar motion of the Earth is the motion of the Earth's rotational axis relative to its crust.: 1  This is measured with respect to a reference frame in...

which varies due to irregularities and long-term slowdown in the Earth's rotation. The UTC time standard, widely used for international timekeeping and...

than the rotation of the Earth. Metrologists also knew that Earth's orbit around the Sun (a year) was much more stable than Earth's rotation. This led...

inertia around Earth's axis of rotation A, moment of inertia around any equatorial diameter of Earth C − A, moment of inertia of Earth's equatorial bulge...

"friction") caused by Earth's rotation and the forces acting upon it by the Moon are a driving force for plate tectonics. As Earth spins eastward beneath...

Spherical Earth or Earth's curvature refers to the approximation of the figure of the Earth as a sphere. The earliest documented mention of the concept...

since the satellite travels prograde with the Earth's rotation (the same direction as the rotation of Earth). ^a Geosynchronous satellites actually orbit...

future of Earth can be extrapolated based on the estimated effects of several long-term influences. These include the chemistry at Earth's surface, the...

the subsolar point crosses Earth's equator at a shallow angle, sunlight shines perpendicular to Earth's axis of rotation, and all latitudes have nearly...