Is the following sentence a sentence or a fragment? “Constellations, small group of stars”

It would be a fragment

Explanation:

The Renaissance was a cultural movement that initially began in Florence, Italy, but later spread throughout Europe. The Renaissance is generally understood to be the art, literature and culture accumulated in the 14th to 16th centuries. The Catholic Church was unable to deliver the religious duties and needed reform. There was an upcoming belief called Humanism during the Renaissance. A rising interest in showing everything open and detailed gave the art even more realism. Therefore everything got changed during this period.