What is Radio telescope?
[[File:CSIRO ScienceImage 3881 Five Antennas at Narrabri - restoration1.jpg|thumb|right|300px|[[Australia Telescope Compact Array]]: a radio telescope]] A '''radio telescope''' is a type of [[antenna]] used for [[radio astronomy]]. The majority look like a huge [[satellite television]] dish. Stars shine, and the light can be seen with an ordinary [[telescope]], but they also give off [[radio wave]]s. [[Scientist]]s with radio telescopes receive these radio waves and use [[computer]]s to learn about the stars. Other things like [[black hole]]s also give off radio waves, and radio telescopes are useful for learning about them too. The dish is sometimes constructed of a [[conductive]] wire mesh whose openings are smaller than a wavelength. The information received by several radio telescopes in different places can be combined. This gives similar results to having a single dish as big as the distance between the telescopes. It can receive very faint signals, and see more details. The biggest telescope is a virtual radio telescope almost as big as the Earth, called the Event Horizon Telescope. The radio telescope at the [[Parkes Observatory]], [[Parkes, New South Wales]] was used by [[NASA]] to receive messages from the [[Apollo 11]] moon landings. == Related pages == * [[Atacama Large Millimeter Array]] {{tech-stub}} [[Category:Telescopes]]