| Name | Name:Aon Center (Los Angeles) | Name:Arecibo Telescope | 
| Height | Height:262 m, (860 ft) | Height:150 m, (492 ft) | 
| Location | Location:Los Angeles, United States | Location:Arecibo, United States | 
| Year Constructed | Year Constructed:1973 | Year Constructed:1963 | 
| Description | Description: | Description:A very tall Telescope . In 2013 it was the tallest Telescope in the world. | 
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