Maintenance of a VLA Antenna
![Technicians maintaining a VLA antenna](https://public.nrao.edu/wp-content/uploads/2013/09/gallery-images-largeVLAbearingmaintenance_large.jpg)
The 28 antennas at the Very Large Array (VLA) each take turns coming into the Antenna Assembly Building, or Barn, for routine maintenance. Telescope technicians carefully test and service these 230-ton telescopes.
Credit: B. Saxton, NRAO/AUI/NSF
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