Cygnus OB2 is a massive star cluster located in the constellation Cygnus. It is one of the most significant regions of star formation in our galaxy, containing a large number of hot, young, and massive stars. The cluster is approximately 4,500 light-years away from Earth and is part of the larger Cygnus X region, known for its rich stellar activity. The stars in Cygnus OB2 are primarily O-type and B-type stars, which are among the hottest and most luminous. These stars have short lifespans, typically only a few million years, and their intense radiation contributes to the surrounding interstellar medium, influencing the formation of new stars in the area.