plural of planetary gear

plural of planetary gear train

plural of planetary nebula nucleus

(astronomy) The remnant hot luminous core of the stellar progenitor of the planetary nebula, which ionizes the surrounding planetary nebula.

(fandom slang) The unnamed fictional planet which serves as the setting for the A Song of Ice and Fire novel series and its television adaptation Game of Thrones.

Alternative form of protoplanetary

Unable to leave a planet

Synonym of planetological