Surface
The surface, ground, or overside is where the outer crust of a planetary body or celestial object meets the atmosphere or outer space. The study of planetary surfaces impacts the planetary science fields of geography, geology and exogeology. Something below the surface was said to be .

In exploring new worlds, Starfleet will often send landing parties to the surface of planets, asteroids or comets deemed safe to gather information or investigate unusual readings. (, et al.)

For cultures driven underground like the Ocampa and the Novans, the surface was often seen as dangerous. (, )

In 2364, when a star exploded, as it transitioned from a red supergiant to a white dwarf, a piece of the star's surface was blown into space. ()

See also 
 Land
 Surface gravity
 Surface Station
 Surface temperature

External link 
 
Geoscience