Cyanic Worlds appear green from space, and have dark green surfaces. They usually have huge quantities of Cyano-acetylene. In Sol, Ganymede is a Cyanic World. - Cyanic

Magnetic Worlds have ferromagnetic metals, especially nickel and niobium, and a small amount of exotic magnetic monopoles. They appear green from space and have a brown-green surface. Their strong magnetic fields cause the manifestation of vicious lightning storms - Magnetic

Quasi-Degenerate Worlds often have some exotic Degenerate Matter. They appear green from space and have a dark-green surface. - Quasi

Rainbow Worlds are "worlds whose radiant energies defy all scanners producing a rainbow-like image". - Rainbow (This could possible be research to show different types of scanning tech)

Plutonic Worlds are geologically active, but have little vulcanism. Therefore, most rocks there formed deep beneath the crust, and frequently contain large deposits of base, rare earth, and radioactive metals. These uncommon worlds are large and yellow, when viewed from space, and have orange-yellow, red, and brown surfaces. - Plutonic

An interstellar planet (free-floating planet) is the most mysterious type of exoplanets. They are orbiting the galaxy core directly and are not gravitationally bound to any star. These objects may form on their own through gas cloud collapse similar to star formation, or were ejected from orbit around a star. (Someone come up with a name)

Everyone seems to like planets so i thought i might throw some out there