What Happens If We Bring the Sun to Earth？

Depending on which part of the sun it is, like most of the matter in the universe, our sun is neither solid nor gas, but a plasma state, which is when something is so hot that its nuclei and electrons can be separated and move around freely, creating a sticky substance.
So you can think of our sun as a big ball filled with a sea of very hot goo, and the deeper you go, the thicker and weirder the goo gets.