Origin: Latin suffix -ary
Planetary has 6 different meanings across 1 category:
A planetary nebula.
"The telescope captured an image of a glowing shell of gas expanding from a dying star, revealing its true nature as a planetary nebula rather than an actual planet."
of or relating to or characteristic of the planet Earth or its inhabitants
"planetary rumblings and eructations"
"the planetary tilt"
"this terrestrial ball"
involving the entire earth; not limited or provincial in scope
"global war"
"global monetary policy"
"neither national nor continental but planetary"
"a world crisis"
"of worldwide significance"
Of, or relating to planets, or the orbital motion of planets.
"The planetary alignment was visible in the night sky as all the major planets lined up along a single band of light."
In plain English: Planetary means relating to planets, which are large celestial bodies that orbit around stars like our Sun.
"The planetary system includes the sun and all the objects that orbit around it."
Usage: Use planetary when describing anything related to specific celestial bodies like Earth or Mars, rather than using it as a general synonym for space-related terms such as cosmic or astronomical. This adjective specifically denotes objects formed from accretion disks that orbit stars within their habitable zones.
The word planetary comes from combining the root planet with the suffix -ary. It entered English to describe anything related to a planet or its motion around the sun.