Where was the CETI created by Frank Drake and Carl Sagan in 1974 sent?
Communication with extraterrestrial intelligence:  The best-known CETI experiment of its kind was the 1974 Arecibo message composed by Frank Drake and Carl Sagan. Arecibo message: The Arecibo message is a 1974 interstellar radio message carrying basic information about humanity and Earth sent to globular star cluster M13 in the hope that extraterrestrial intelligence might receive and decipher it.
sent to globular star cluster M13