Who decapitated Knowhere Celestial?

Trivia. In the comics, Knull, the overlord of the Symbiote race, decapitated a Celestial’s head and as it eroded over a millennia; it was taken placed as a city known as Knowhere. Knowhere orbits in a binary system, around a black hole currently absorbing its twin star. Knowhere’s coordinates are M3RD 17H17211+2121224.

Who killed the celestials in Marvel?

The Celestials of Earth-4280 were convinced they were gods and attempted to conquer the Multiverse by use of the Bridge, a device created by Reed Richards that allows its users to observe and enter alternate worlds. They were defeated by the combined forces of Galactus and a Franklin Richards from an alternate future.