The National Science Foundation announced Thursday that it will not rebuild a renowned radio telescope in Puerto Rico, which was one of the world's largest until it collapsed nearly two years ago. The Associated Press reports: Instead, the agency issued a solicitation for the creation of a $5 milli...

The radio telescope at Arecibo was once the largest single-aperture telescopes in the world, at 305m/1000ft across. During its lifetime it was surpassed by the 500m aperture spherical telescope (FAST) in Guizhou, China, which is still in use. Interferometry makes "virtual" large-aperture radio telescopes possible by combining inputs from separate radio telescopes. Such as the Very Large Array (US), VLTI, and ALMA, and the planned Square Kilometre Array.

https://en.wikipedia.org/wiki/Square_Kilometre_Array https://en.wikipedia.org/wiki/Radio_telescope https://www.eso.org/public/teles-instr/technology/interferometry/