Look up into the sky. Stars, planets, comets, asteroids, galaxies, etc., are celestial bodies.
A celestial body is any physical body beyond the earth's atmosphere.
No sun doesn't revolve to any celestial body, but the celestial body revolve around the sun.
the north star ,polaris
The Milky Way
The Space Station is no a celestial body. Celestial bodies are natural -- not man made.
The moonMoon is the closet celestial body.
satellite
No, a supernova is an explosion of a star. What left of a supernova are celestial bodies.
A Comet
A large celestial body that is composed of gas and emits light is called a star.
Saturn.
pluto