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The Very Large Array is a radio astronomy observatory that consists of 27 independently movable radio antennae, each of which has a dish diameter of 25 meters and weighs 230 tons. There are four commonly used configurations, designated A (the largest, when the furthest dishes are 36 km apart) through D (the tightest, when all 27 are within 600 m of the center point).

Photo credit: Hajor
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