Observational Hallmarks of Evolution and Planet Formation in Circumstellar Disks
Sean Andrews

The key processes involved in the evolution of circumstellar disks and the assembly of planetary systems are just now becoming accessible to astronomical observations. The new promise of observational work in the field of planet formation makes for a very dynamic research scenario, which is certain to be amplified in the coming years as the revolutionary ALMA facility ramps up to full operations. To highlight some of the new directions being explored in this area, I will describe how we are using high angular resolution measurements at millimeter/radio wavelengths to study crucial aspects of the formation and early evolution of planetary systems. After providing a brief overview of the key "external" factors that affect disk properties, like host mass, multiplicity, and environment, I will focus on our current efforts to observe and quantify the most fundamental "internal" disk evolution process: the growth and migration of solids.