The fixed reference axis from which the polar angle is measured in a polar coordinate system.
(pl. polar axes) ( Wodehouse, 1935) The straight line between the distal and proximal poles of a pollen grain or spore. See also: equatorial diameter, polarity.* Polar distance ( Punt, 1984) The vertical distance from the equator to the pole (pd). Polar field ( Beug, 1961) Synonym of apocolpium.
The axis of an equatorial telescope mounting that is parallel to the earth's axis of rotation.
The axis of the earth's rotation between the true North and South poles.
The axis of rotation of the Earth; also, an axis in the mounting of a telescope that is parallel to the Earth's axis.
The telescope mount axis that is parallel to the Earth's axis. With a motorized drive, celestial objects can be tracked and remain in the eyepiece field of view throughout the night.
Is a line drawn through the Earth around the planet rotates. The point at which the polar axis intercepts the Earth's surface in the Northern Hemisphere is called the North Pole. Likewise, the point at which the polar axis intercepts the Earth's surface in the Southern Hemisphere is called the South Pole.
The axis of an equatorial mounting intended for alignment with the North Celestial Pole and thus with the rotational axis of the Earth, enabling a telescope to track celestial objects without rotating the field of view.