The Very Large Array has the best resolution! The resolution of any telescope can be calculated by dividing the wavelength of the energy you are detecting, by the diameter of the telescope's reflector. The bigger the reflector or dish, the better the resolution.

The Very Large Array consists of 27 radio antennas in a Y-shaped configuration. Although each antenna is only 25 meters (82 feet) in diameter, they all work together! The data from the antennas is combined electronically to give the resolution of a single reflector 36km (22 miles) across!!