What are Some Key Findings from Protoplanetary Disk Observations?

Observations of protoplanetary disks have led to several key findings. For instance, gaps and rings observed in disks suggest the presence of forming planets, which can carve out these features as they orbit the protostar. Additionally, the detection of complex organic molecules in disks indicates that the building blocks of life might be common in planet-forming regions. These discoveries provide valuable insights into the conditions and processes that lead to planet formation.