The Very Large Array is the most versatile, widely-used radio telescope in the world.
The Karl G. Jansky Very Large Array (VLA), located on the Plains of San Agustin, New Mexico, is an exceedingly powerful scientific instrument which has transformed many areas of astronomy. Dedicated in 1980, the VLA consists of 27 antennas arranged in a “Y” pattern. To date, the VLA has been used by more astronomers producing more scientific papers than any other radio telescope in the world. The VLA exceeds all other radio astronomy facilities with its combination of sensitivity, flexibility, speed, and overall imaging quality. We put our telescopes on rails. Four times a year, a specially-designed rail truck, called a Transporter, picks up telescopes and hauls them one at a time farther down their track. Over the course of a year, the VLA lengthens each of its legs from two-thirds of a mile to 23 miles long.
Astronomers today are imagining the next generation Very Large Array (ngVLA). A consensus of the larger astronomical community believes with modifications resulting in 244, 59-foot (18-meter) dishes spread over 5,505 miles (8,860 km), this modified observatory will address some of the biggest science questions that radio astronomy can help answer. Areas of exploration include the formation of solar systems, high energy events, the detection of supermassive black holes, and the chemical foundations of life.
Among the observations at the VLA are: black holes and protoplanetary disks around young stars, the discovery of magnetic filaments and traced complex gas motions at the Milky Way’s center, probing the Universe’s cosmological parameters, and providing new knowledge about the physical mechanisms that produce radio emission.
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https://public.nrao.edu/news/key-feature-powerful-radio-galaxies/, https://public.nrao.edu/news/cannonball-pulsar/ , https://public.nrao.edu/news/mysterious-cosmic-blast/, Interested in what configuration the VLA is in today?