General astronomy

General astronomy

Contributors in General astronomy

General astronomy

The alphabetic letter ("variable") used to denote the distance between the sun and the object being discussed, also called the object's heliocentric distance; in most ephemerides of objects such as ...

precession

Astronomy; General astronomy

A slow but relatively uniform motion of the earth's rotational axis that causes changes in the coordinate systems used for mapping the sky. The earth's axis of rotation does not always point in the ...

photometry

Astronomy; General astronomy

In astronomy, the measurement of the light emitting from astronomical objects, generally in the visible or infrared bands, in which a specific or general wavelength band is normally specified. An ...

parallax

Astronomy; General astronomy

The apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object (as from two different observing sites on ...

nuclear magnitude

Astronomy; General astronomy

See definition for m 2 , above.

orbital elements

Astronomy; General astronomy

Parameters (numbers) that determine an object's location and motion in its orbit about another object. In the case of solar-system objects such as comets and planets, one must ultimately account for ...