Arecibo Observatory

The Arecibo Observatory, also known as the National Astronomy and Ionosphere Center and formerly known as the Arecibo Ionosphere Observatory, is an observatory in Barrio Esperanza, Arecibo, Puerto Rico owned by the US National Science Foundation. The observatory's main instrument was the Arecibo Telescope, a 305 m spherical reflector dish built into a natural sinkhole, with a cable-mount steerable receiver and several radar transmitters for emitting signals mounted 150 m above the dish. 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 in China. Following two breaks in cables supporting the receiver platform in mid-2020, the NSF decommissioned the telescope. A partial collapse of the telescope occurred on December 1, 2020, before controlled demolition could be conducted. The remains of the telescope are being removed as NASA evaluates plans for a replacement instrument.

Read more in the app

Arecibo observatory scientists help unravel surprise asteroid mystery

Arecibo observatory scientists help unravel surprise asteroid mystery

What happened at the Arecibo Observatory? New inquiry launched into iconic telescope's collapse.

Arecibo Observatory: A year after telescope's collapse, an icon gets continuing cleanup and a new documentary

The Arecibo Observatory Was Like Family. I Couldn't Save It

Arecibo Observatory telescope cleanup could cost up to $50 million, NSF reports

Arecibo Observatory has more science to do despite iconic radio telescope's collapse

Cleanup of Arecibo Observatory's collapsed radio telescope seen from space

Opinion: The case for donating and selling off the wreckage of Arecibo Observatory to museums, institutions, and fans.

Preliminary investigation offers possible cause of Arecibo Observatory telescope collapse