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Due to the very slow pole motion of the Earth, the Celestial Ephemeris Pole (CEP, or celestial pole) does not stay still on the surface of the Earth.The Celestial Ephemeris Pole is calculated from observation data, and is averaged, so it differs from the instantaneous rotation axis by quasi-diurnal terms, which are as small as under 0.01" (see [6]).
In geometry the rotation group is the group of all rotations about the origin of three-dimensional Euclidean space R 3 under the operation of composition. [1] By definition, a rotation about the origin is a linear transformation that preserves length of vectors (it is an isometry) and preserves orientation (i.e. handedness) of space.
In organic chemistry, an electrocyclic reaction can either be classified as conrotatory or disrotatory based on the rotation at each end of the molecule. In conrotatory mode, both atomic orbitals of the end groups turn in the same direction (such as both atomic orbitals rotating clockwise or counter-clockwise). In disrotatory mode, the atomic ...
Interactive maps, databases and real-time graphics from The Huffington Post
The former Philadelphia Phillies slugger signed the Brewers' biggest free-agent contract since 2018. He missed all of 2023 with a torn ACL. ... Brewers depth chart, including starting rotation ...
Since November 2021, a stealthy sector rotation has been unfolding in the stock market where the smart money dumped the growth stocks and rotated into the value stocks.
Even down half a rotation, ... though, who charts Indiana’s course — and, again, whose ebbs and flows come into focus in context. ... 37.5% from 3-point range and 80.9% from the free-throw ...
One voltage cycle of a three-phase system. A polyphase system (the term coined by Silvanus Thompson) is a means of distributing alternating-current (AC) electrical power that utilizes more than one AC phase, which refers to the phase offset value (in degrees) between AC in multiple conducting wires; phases may also refer to the corresponding terminals and conductors, as in color codes.