Planetary means relating to a
planet
A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a you ...
or planets. It can also refer to:
;Science
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Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and maintain environments hospitable to life. Life may be generated directly on a planet or satellite endogenously or be transferred to it from ...
, the measure of an astronomical body's potential to develop and sustain life
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Planetary nebula
A planetary nebula (PN, plural PNe) is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
The term "planetary nebula" is a misnomer because they are unrelate ...
, an astronomical object
;People
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Planetary (rapper), one half of east coast rap group OuterSpace
;Arts, entertainment, and media
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''Planetary'' (comics), a comic book series by Warren Ellis and John Cassaday
* "
Planetary (Go!)", a 2011 song by rock band My Chemical Romance
* ''
Planetary Radio'', a public radio show about space exploration, produced by The Planetary Society
;Organizations
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The Planetary Society
The Planetary Society is an American internationally-active non-governmental nonprofit organization. It is involved in research, public outreach, and political space advocacy for engineering projects related to astronomy, planetary science, a ...
, the Earth's largest space interest group
;Technology
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Epicyclic gearing
An epicyclic gear train (also known as a planetary gearset) consists of two gears mounted so that the center of one gear revolves around the center of the other. A carrier connects the centers of the two gears and rotates the planet and sun gea ...
(planetary gearing), an automotive transmission technology
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Planetary scanner - type of image scanner for making scans of rare books with mounted camera taking photos
{{disambiguation