The GRAVITY instrument combines the light from multiple telescopes to form a virtual telescope up to 200 metres across, using a technique called interferometry. This enables the astronomers to detect much finer detail in astronomical objects than is possible with a single telescope. <br /> <br />Credit: <br />ESO/GRAVITY consortium/NASA/ESA/M. McCaughrean <br /> <br />http://www.eso.org/public/news/eso1601 <br /> <br />.
