A descriptor term used in the Gazetteer of Planetary Nomenclature.
Definition
A large area marked by reflectivity or color distinctions from adjacent areas or a broad geographic region (IAU Gazetteer 2014).
Previous Definition
A large area marked by reflectivity or color distinctions from adjacent areas (Wayman 1980).
Origin of Term
Direction, area on the sky, Latin.
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References
Dollfus A (1960) Sous-Commission de la Nomenclature Martienne. In: Sadler DH (ed) Proceedings of the 10 general assembly. Transactions of the IAU, vol X. Cambridge University Press, London/New York, pp 259–262
IAU Gazetteer (2014) Gazetteer of planetary nomenclature. International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN). http://planetarynames.wr.usgs.gov/DescriptorTerms
Sadler DH (ed) (1958) Proceedings of the 10th general assembly. Transactions of the IAU, vol X B. Cambridge University Press [cited by IAU Gazetteer (2014)]
Wayman P (ed) (1980) Proceedings of the 17th General Assembly. Transactions of the IAU, XVII B. D. Reidel Publishing Company, Dordrecht, Holland
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Hargitai, H. (2014). Regio, [Regiones]. In: Encyclopedia of Planetary Landforms. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9213-9_292-1
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DOI: https://doi.org/10.1007/978-1-4614-9213-9_292-1
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