The solar core is a term used to describe the innermost region of the sun. It is the area where nuclear fusion takes place and the source of the sun's energy. Synonyms for solar core include the sun's innermost region, the center of the sun, and the solar nucleus. Other synonyms include the sun's core, the heart of the sun, and the solar interior. The term solar center or sun's center can also be used interchangeably with the solar core. Regardless of the term used, the solar core is a critical component of the sun, and understanding it is essential in studying the properties of our star.