NGC3603

NGC 3603 is a massive and luminous star cluster located in the Carina constellation, associated with a vast HII region. It is one of the most massive and brightest star-forming regions in our galaxy, containing some of the most luminous and massive stars known, including the binary system NGC 3603 A1.[1][2] The cluster and nebula are visible in medium-sized telescopes as a small nebulosity, making it an ideal target for studying star formation processes and the evolution of massive stars.

Sources
NGC 3603 - Wikipédia