equatorial plane


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equatorial plane

See equator.

equatorial plane

[‚e·kwə′tȯr·ē·əl ′plān]
(astronomy)
The plane passing through the equator of the earth, or of another celestial body, perpendicular to its axis of rotation and equidistant from its poles.
(cell and molecular biology)
The plane in a cell undergoing mitosis that is midway between the centrosomes and perpendicular to the spindle fibers.
(mechanics)
A plane perpendicular to the axis of rotation of a rotating body and equidistant from the intersections of this axis with the body's surface, provided that the body is symmetric about the axis of rotation and is symmetric under reflection through this plane.
(optics)
References in periodicals archive ?
Chromosomes from the male and female pronuclei gathered and aligned on the equatorial plane of the spindle organized by the two centrosomes (Fig.
The rings of Saturn lie in the equatorial plane of the planet, which means that at the March equinox on Saturn, the Sun rises for the northern side of the rings and sets for the southern side, whereas at the September equinox the Sun rises for the southern side of the rings and sets for the northern side.
Prophase II--spindles form and chromosomes begin to move to equatorial plane.
In the same way, the axial divergence should be measured by scanning the primary beam perpendicularly to the diffraction plane, a motion not attainable even on a 4-circle diffractometer, since source and detector cannot move out of the equatorial plane.
When it is established that the micrograph shows two spherulites, one can see that the voided areas are located essentially in the meridional regions of the spherulites and, to a lesser degree, in the equatorial plane at the edges of the spherulite.
They believe that some 500 billion years ago, another tectonic shift caused the planet to veer a full 90 degrees, sending both poles into the equatorial plane and, quite possibly, prompting the "Cambrian explosion" of multicellular life.
Because of his general fascination with stars and the planets that extended beyond the earth's borders, he used his technical background to create a telescope mount with a revolving dome on an equatorial plane.
KOMPSAT, known in Korea as Arrirang I, is in a 685 kilometer, sun-synchronous orbit at 98 degrees to the Earth's equatorial plane.
ERG will make a comprehensive observation of the electrons and ions near the equatorial plane in geospace, which is thought to be the area where the acceleration of such electrons is occurring.
S/2004 N 1 appears to travel in a near-circular orbit very close to Neptune's equatorial plane.
Ultra-relativistic particles move very fast and cannot be at the right frequency with waves when they are close to the equatorial plane," said Ksenia Orlova, a UCLA postdoctoral scholar in Shprits' group who is funded by NASA's Jack Eddy Fellowship.