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. E zigara ozi ahụ na mbara igwe otu oge site na ebili mmiri redio na-agbanwe agbanwe na ememe iji gosipụta mgbanwe nke Arecibo radio telescope na Puerto Rico na November 16, 1974. E zigara ozi ahụ na ọnọdụ M13 ugbu a ihe dị ka afọ 25,000 dị anya n'ihi na M13 bụ nnukwu kpakpando dị nso nke dị na mbara igwe n'oge na ebe ememe ahụ. Ozi ahụ nwere 1,679 ọnụọgụ ọnụọgụ abụọ, ihe dị ka 210 bytes, na-ebute na ugboro ole nke 2,380 MHz ma na-agbanwe site na ugboro ole site na 10 Hz, na ike nke 450 kW.
Afọ 1974