Ostro, in recognition of the observatory's contributions to the characterization of Solar System bodies. The asteroid 4337 Arecibo is named after the observatory by Steven J. The observatory also includes a smaller radio telescope, a LIDAR facility, and a visitor center, which remained operational after the telescope's collapse. In 2022, the NSF announced the telescope will not be rebuilt, with an educational facility to be established on the site. A full collapse of the telescope occurred on December 1, 2020, before either repairs or controlled demolition could be conducted. Following two breaks in cables supporting the receiver platform in mid-2020, the NSF decommissioned the telescope. Completed in 1963, it was the world's largest single-aperture telescope for 53 years, surpassed in July 2016 by the Five-hundred-meter Aperture Spherical Telescope (FAST) in China. The observatory's main instrument was the Arecibo Telescope, a 305 m (1,000 ft) spherical reflector dish built into a natural sinkhole, with a cable-mount steerable receiver and several radar transmitters for emitting signals mounted 150 m (492 ft) above the dish. The Arecibo Observatory, also known as the National Astronomy and Ionosphere Center ( NAIC) and formerly known as the Arecibo Ionosphere Observatory, is an observatory in Barrio Esperanza, Arecibo, Puerto Rico owned by the US National Science Foundation (NSF).
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