We present the first science results from the Keck Interferometer , a direct-detection infrared interferometer utilizing the two 10-meter Keck telescopes .
The instrument and system components are briefly described .
We then present observations of the T Tauri object DG Tau , which is resolved by the interferometer .
The resolved component has a radius of 0.12 to 0.24 AU , depending on the assumed stellar and extended component fluxes and the model geometry used .
Possible origins and implications of the resolved emission are discussed .