The VLA - Very Large Array - Radio Telescope in Socorro, New Mexico

The Very Large Array, one of the world's premier astronomical radio observatories, consists of 27 radio antennas in a Y-shaped configuration on the Plains of San Agustin fifty miles west of Socorro, New Mexico. There are four commonly used configurations, designated A (the largest) through D (the tightest, when all the dishes are within 600 metres (2, 000 ft) of the center point). The observatory normally cycles through all the various possible configurations (including several hybrids) every 16 months; the antennas are moved every three to four months.