![The Gregorian Dome reflector and delay line feed antenna is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Ric Stock Photo - Alamy The Gregorian Dome reflector and delay line feed antenna is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Ric Stock Photo - Alamy](https://c8.alamy.com/comp/2CDB399/the-gregorian-dome-reflector-and-delay-line-feed-antenna-is-suspended-490-feet-above-the-radio-telescope-dish-of-the-arecibo-observatory-in-puerto-ric-2CDB399.jpg)
The Gregorian Dome reflector and delay line feed antenna is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Ric Stock Photo - Alamy
SETI Institute - The SETI Institute is exploring a collaboration with the Arecibo Observatory (AO) in Puerto Rico to deploy an Antonio Feed in AO's Gregorian dome to conduct SETI observations. The
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