The congestion of stars in the Milky Way can hide the biggest star in the Universe

The star population connected with Vesterlund 1, includes all types of massive stars. Research of this population are published in library arXiv pre-prints. Stars are, as a rule, formed in congestions or groups from ten stars to several thousand. All of them approximately identical age and with similar structure, though are at different stages of evolution. One is especially distinguished from congestions of the Milky Way — Vesterlund with 1 (Wd 1). Its age — less than 10 million years. For comparison, to the Sun about 5 billion years. Vesterlund 1 is considered the most massive congestion in our galaxy. Its star...