Protoplanetary systems are regions of space surrounding young stars where planets are thought to form. These systems consist of a central star surrounded by a disk of gas and dust, known as a protoplanetary disk. The material in these disks coalesces and clumps together to form larger bodies, known as planetesimals, which eventually grow into planets. Studying protoplanetary systems is important for understanding the process of planet formation and the diversity of planetary systems in the universe. Scientists use a variety of techniques, including observations with telescopes and simulations, to study these systems and learn more about the conditions that lead to the creation of planets.