Definition of planetography in US English:

planetography

noun

  • Originally: the branch of knowledge that deals with the planets; a treatise on or description of the planets. Now also: (Science Fiction) the geography or physical features of a planet.

Origin

Mid 18th century; earliest use found in Benjamin Martin (bap. 1705, d. 1782), lecturer on science and maker of scientific instruments. From planet + -ography.

Pronunciation

planetography

/ˌplanɪˈtɒɡrəfi/