Most stars, probably all stars, formed:

Question

Quizplus · Accepted Answer

Most stars formed in a cluster of stars. This is known as "stellar nurseries" or "star-forming regions" where large clouds of gas and dust slowly collapse under their own gravity to form stars. Often, multiple stars form simultaneously within these regions leading to the formation of clusters. While some stars may form in binary or triple systems, this is less common than cluster formation. Most stars are believed to have formed in a cluster of stars, where the gas and dust of the interstellar medium come together to form multiple stars simultaneously.

Most Stars, Probably All Stars, Formed