Commission done for  angel-of-life of Across capturing the energy of a galactic gamma ray burst. He is not actually as big as the galaxy or his mass would cause it to break up almost immediately.

Macro's that big, are not really that big. Their relationship to the universe allows them to be such a size. Physically they can not really be that big. It's like a projection. It's also why they can see and interaction at such a size and not take eons to do simple things. But there is so little to do at that size, most macros don't get that big and stay so very often or for very long.

Enjoy.