(Greek mythology) The five Greek gods of the "Wandering Stars", (i.e. "planets"), (Phaenon (Saturn), Phaethon (Jupiter), Pyroeis (Mars), Eosphorus/Hesperus (Venus), and Stilbon (Mercury). They were the sons of the Eos (goddess of the dawn) and Astraeus (god of the dusk), and their siblings were the four Anemoi ("winds").

plural of planetary aberration

(astronomy) A deviation of where a planet appears to be, due to the motion of the planet during the time that the light reaches the Earth.

plural of planetarian

A species of large tree native to eastern North America and planted elsewhere, Platanus occidentalis

plural of planetary

plural of planetary body

plural of planetary object

A seismic event occurring on a planet (especially one other than Earth).

plural of planetquake