Astronomy

• star

  (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions...

• planet

  (astronomy) any of the nine large celestial bodies in the solar system that revolve around...

• primary

  (astronomy) a celestial body (especially a star) relative to other objects in orbit around...

Also contains

• satellite

  Any celestial body orbiting around a planet or star.

• minor planet

  Any of numerous small celestial bodies that move around the sun.

• star

  Any celestial body visible (as a point of light) from the Earth at night.

• planet

  Any celestial body (other than comets or satellites) that revolves around a star.

• planetesimal

  One of many small solid celestial bodies thought to have existed at an early stage...

• quasar

  A starlike object that may send out radio waves and other forms of energy; many have large...