• Position of an object on the Earth’s surface relative to the equator, measured in degrees so that the poles are at 90°. Latitude in the sky, measured from the celestial equator, is called declination. The mapping of celestial bodies like Mercury, Mars, Venus and many planetary satellites has allowed latitudes and longitudes there to be defined accurately.
  • Imaginary circles which are drawn parallel to the equator, and whose circumferences diminish as they approach each pole. All points along the equator have a latitude of 0°, while parallels of latitude above the equator work their way towards 90 °N, and those below the equator work their way towards 90 °S. These circles cross the meridians of longitude at right angles, and together serve to define locations on the planet. Its abbreviation is lat.

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