Abstract
During the last two decades, the advent of high-angular resolution imaging techniques on large optical and infrared telescopes has generated an empirical revolution in many aspects of astrophysics. In this contribution, I describe some of the techniques developed in recent years to obtain high-angular resolution images and present their advantages and limitations. I then illustrate the key role played by these techniques by presenting some of the most important results obtained in the study of extrasolar planets and planet-forming disks around stars other than our Sun.
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