Young stellar objects (YSOs) are a class of stars that are in the early stages of their evolution. They are typically less than a few million years old and are still in the process of forming into mature stars. YSOs are often surrounded by protoplanetary disks, which are flat, rotating disks of gas and dust from which planets are believed to form. Studying YSOs can provide valuable insights into the processes of star formation, planetary formation, and the early evolution of stars. Researchers use a variety of observational techniques, such as infrared and radio telescopes, to study the properties of YSOs and their surrounding environments. By studying YSOs, scientists can better understand the conditions and mechanisms that give rise to new stars and planetary systems.