Question: what is the sun made out of?

Alexander Allen answered on 10 Mar 2019:

The Sun, like most stars is made primarily of the most simple element in the universe: that is hydrogen. The Sun is so dense and so hot that the hydrogen is forced together. This makes up a nuclear process that forces multiple atoms to fuse into bigger atoms and this causes massive amounts of energy to be released.

The fused atoms make up the rest of the Sun, the rest being helium, the finished product of the fusion process.

When the Sun gets older it will run out of hydrogen and begin to collapse, heating up and allowing it to start fusing helium into bigger elements still. The star will begin to become a red giant at this point!