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Starting in 2008, NASA has provided the exoplanet community an observationalprogram aimed at obtaining the highest resolution imaging available as part ofits mission to validate and characterize exoplanets, as well as their stellarenvironments, in search of life in the universe. Our current program usesspeckle interferometry in the optical (320-1000 nm) with new instruments on the3.5-m WIYN and both 8-m Gemini telescopes. Starting with Kepler and K2follow-up, we now support TESS and other space- and ground-based exoplanetrelated discovery and characterization projects. The importance ofhigh-resolution imaging for exoplanet research comes via identification ofnearby stellar companions that can dilute the transit signal and confoundderived exoplanet and stellar parameters. Our observations therefore providecrucial information allowing accurate planet and stellar properties to bedetermined. Our community program obtains high-resolution imagery, reduces thedata, and provides all final data products, without any exclusive use period,to the community via the Exoplanet Follow-Up Observation Program (ExoFOP)website maintained by the NASA Exoplanet Science Institute. This paperdescribes the need for high-resolution imaging and gives details of the speckleimaging program, highlighting some of the major scientific discoveries madealong the way.

The NASA High-Resolution Speckle Interferometric Imaging Program: Validation and Characterization of Exoplanets and Their Stellar Hosts