#radio telescope

• Alma — A proper feminine given name widely used internationally, originating from Latin where it means 'nourishing' or 'kind', or from Hungarian where it means 'apple'. In contemporary science, ALMA is the acronym for the 'Atacama Large Millimeter/submillimeter Array', the largest and most expensive ground-based radio telescope in the world, located in the Atacama Desert of Chile; it is also the name of a historical river in the Crimean Peninsula.
• Arecibo — A proper geographical name designating a coastal municipality in Puerto Rico, globally famous for its iconic Arecibo Observatory, a massive astronomical structure built inside a natural sinkhole depression. Structurally, the observatory served for decades as a cornerstone in astrophysics, ionospheric research, and SETI programs searching for extraterrestrial intelligence, and was also the origin of the famous 'Arecibo Message' beamed into space in 1974.