radio_telescope
A specialized parabolic antenna which can track different regions of the night sky in contrast with satellite_dishes which are aimed and fixed towards geostationary satellites.
Frequently located on isolated areas as to avoid human-made signals, it surveys the sky for radio signals instead of light.
h4. See Also
* radar
* radar dish
* radio antenna
* radio tower
* satellite dish
h4. External links
* Wikipedia: Radio Telescope