A large astronomical body that revolves around a central star. It is usually part of a solar system.

In Qualculus a body of knowledge you may assume to be true.

A Realm of information or knowledge.
A School of thought
A Knowledgebase or collection of thoughts (Qualculus)

A large body, smaller than a star but larger than an asteroid. A planet is also known as Melissa.

Another way to refer to an overweight friend

1) The english spelling of a Greek word made up of the characters Pi, Lambda, Alpha, Nu , Epsilon, Tau, Epsilon, Sigma. It means "Wanderer" or "Traveler".

2) An extremely well made, and very realistic Sci-Fi anime series that takes place in the year 2075. The story primarily follows the exploits of Hoshino Hachirota, a troubled young man who works as an astronaut for the private space company "Technora Corp", with a team of diverse and interesting characters who's job is to remove dangerous space debris from Earth's orbit. In short, they are space garbage men.

At its core, Planetes is a story of personal conquest.

The discrimination against planets.

There are billions of planets in the Milky way, yet we only memorize 8? That is planetism.