Guardians of the Galaxy did a lot for the MCU. It presented a likable group of rag-tags to audiences, introduced the universe's cosmic corner, and inadvertently created one of the franchise's most intriguing mysteries. Halfway through the movie, the Guardians traveled to a mining colony called "Knowhere". As Gamora explained, the colony was built inside the severed head of a Celestial, an ancient being of seemingly unlimited power.
Gamora's explanation made several fans and me curious about the alien's beheading. After all, what kind of being is powerful enough to take down and dismember a Celestial?
I know the answer from comics point-of-view, but is there any information in the MCU on this?