Stellar accretion is the process by which matter, such as gas and dust, is drawn into a star by its gravitational pull. This material can come from a surrounding disk or cloud of gas and dust, or from a companion star in a binary system. As the material falls into the star, it can heat up and create intense radiation, leading to the formation of a protostar or fueling the nuclear reactions that power the star. Stellar accretion is a key process in the formation and evolution of stars, and it is often studied using observations of young stars in star-forming regions. Additionally, stellar accretion plays a critical role in shaping the physical and chemical properties of planetary systems.