Resembling or characteristic of a geometrical plane. / Resembling or characteristic of an aeroplane.

(astrophysics) a planet that occupies a Trojan point of a star system

a silicate planet

a terrestrial planet composed mostly of silicate minerals

(astronomy, planets) A planet larger than terrestrial planets, composed mostly of gases and astronomical ices.

the planet Earth

(mineralogy) A triclinic-pinacoidal mineral containing aluminum, hydrogen, oxygen, and phosphorus.

The observation and logging of the registration numbers (tailnumbers) of aircraft as a hobby.

(astronomy) a planet that shares similar physical characteristics, such as size, density and mass, with another planet

(astronomy) Any secondary body in the Solar system that is geologically differentiated or in hydrostatic equilibrium and thus has a planet-like geology: a planet, dwarf planet, or the larger moons and asteroids.