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.

The planetcide caused irreversible damage to the ecosystem.

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.

Planetality is a concept often explored in science fiction novels.

Elon Musk's vision is to create a multi-planetary civilization.

Jupiter is a secondary planet in our solar system.