Sun Wukong said

To build off of this, galactus has the ability to alter his size to whatever fits his needs at that time. The Power Cosmic pretty much let him do what he wants.



I'll also add that Galactus is so hard for the mortal mind to comprehend, that what we see as Galactus is just how the human mind makes sense of him. Other races or beings perceive him differently.

Click to expand...