Adjective
Of or pertaining to planetography
Describing a coordinate based on the direction of a perpendicular at a point on a planet's surface
Source: en.wiktionary.orgA point on the Equator that passes directly in front of this observer later in time has a higher planetographic longitude than a point that did so earlier in time. Source: Internet
The prime meridians of the following planetographic systems have been defined: * Two different heliographic coordinate systems are used on the Sun. Source: Internet