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Circumstellar Disks: Past, Present, and Future Michael Liu University of Hawaii abstract Circumstellar disks are thought to play a central role in the formation of stars. We review our current observational understanding of the physical properties and evolution of disks, as well as the connections with the formation of extrasolar planets and brown dwarfs. We also describe a few of the imminent new instrumental capabilities which should produce substantial advances in our knowledge of disks. |