Arecibo Observatory
Location information

Puerto Rico


Arecibo Observatory message

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The Arecibo Observatory is a powerful radio telescope located approximately 9 miles south-southwest from the town of Arecibo in Puerto Rico. It is operated by Cornell University under cooperative agreement with the National Science Foundation. The observatory works as the National Astronomy and Ionosphere Center (NAIC) although both names are officially used to refer to it. NAIC more properly refers to the organization that runs both the observatory and associated offices at Cornell University.

The observatory's 305-m radio telescope is the largest single-aperture telescope (cf. multiple aperture telescope) ever constructed.

In 1974, they sent the Arecibo message.

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