What Celestial is Knowhere?

Knowhere is the second celestial object orbiting Battleworld, considered to be its moon. Knowhere is the decapitated head of a Celestial, said to have been slain by God Emperor Doom to protect Battleworld, and it remained orbiting the planet as a reminder of Doom’s power.

Is Knowhere the head of a Celestial being?

No known Celestial has been identified as the head used in Knowhere. However, there were once billions of Celestials in the universe and due to a conflict with another early developing race called the Aspirants and the release of a super-weapon called the Godkiller, millions of Celestials were destroyed.