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| | Observatory - Wikipedia, the free encyclopedia |
 | | The largest observatory in the equatorial belt is Observatorio Nacional de Llano del Hato in Venezuela. |
 | | Beginning in the 1940's, radio telescopes were built and began to detect significant radio sources in the universe. |
 | | Major optical observatories include Mauna Kea, HI, USA, Roque de los Muchachos Observatory in the Canary Islands, Paranal Observatory in Chile and Kitt Peak observatory in the USA. |
| en.wikipedia.org /wiki/Observatory (277 words) |
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