“During its first light, and for the first time in the history of long baseline interferometry in optical astronomy, GRAVITY could make exposures of several minutes, more than a hundred times longer than previously possible. GRAVITY will open optical interferometry to observations of much fainter objects, and push the sensitivity and accuracy of high angular resolution astronomy to new limits, far beyond what is currently possible.”
Source: From comments made by Frank Eisenhauer, (MPE, Garching, Germany), as the newly installed instrument GRAVITY at ESO’s Very Large Telescope in Chile made its first observations. GRAVITY successfully combined starlight using four Auxiliary Telescopes as a lar