A radio telescope is a scientific instrument that detects and studies radio waves emitted by celestial objects. However, there are several other synonyms for radio telescope that are often used in astronomy and astrophysics. Some common examples include radio dish, radio array, microwave telescope, and radio interferometer. Radio dishes are normally large metallic structures with huge concave-reflectors to focus radio waves from space onto a receiver. Microwave telescopes, on the other hand, are sensitive to shorter wavelengths and are used to study high-energy astrophysical phenomena such as pulsars and quasars. Radio interferometers are arrays of individual radio dishes linked together to form a more powerful instrument.