There are many planetary bodies in our solar system.

There are many planetary objects in our solar system.

Lingwa de Planeta is a constructed international auxiliary language.

Planet Earth is the third planet from the Sun.

Scientists have discovered a new exo-planet in a distant galaxy.

The planet gears rotate around the sun gear.

The planet gear is an essential component in the epicyclic gear system.

Many planemakers are attending the aviation conference.

The sun and planet gears are essential components of a mechanical system.

Planetary engineering is the practice of deliberately modifying the environment of a planet or moon to suit the needs of a particular population or to make it habitable for humans.