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The Apollo 11 goodwill messages are statements from leaders of 73 countries around the world on a disc about the size of a 50-cent piece made of silicon that was left on the Moon in 1969 by the Apollo 11 astronauts.
The disc also carried names of the leadership of the Congress, the four committees of the House and Senate responsible for legislation related to the National Aeronautics and Space Administration (NASA), and NASA's top management, including past administrators and deputy administrators.
At the top of the disc is the inscription: "Goodwill messages from around the world brought to the Moon by the astronauts of Apollo 11." Around the rim is the statement: "From Planet Earth – July 1969". The collected letters were given to the GCA Corp in Burlington MA which used a reduction camera to make a negative photomask containing all the letters plus an inscription around its edge at its final size. This mask was given to Sprague Electric Company of North Adams, Massachusetts which imaged it onto a silicon wafer and etched the pattern into the wafer. NASA head Thomas O. Paine proposed the idea to the U.S. State Department, and corresponded with world leaders to solicit their messages. These were enshrined by being photographed and reduced to 1/200 scale ultra microfiche silicon etching. The disc rests in an aluminum case on the Moon's Sea of Tranquility.[1]
The disc was in a package in Buzz Aldrin's suit shoulder pocket along with some other memorial items. He was reminded about the package by Neil Armstrong while ascending the ladder of the Lunar Module Eagle to finish their EVA. He then dropped it to the surface.[2] Later Houston requested and received confirmation they had placed it.[3]Template:Apollo11series
| State | Signed by |
|---|---|
| Mohammed Zahir Shah King of Afghanistan | |
| Juan Carlos Onganía President of Argentina | |
| John Gorton Prime Minister of Australia | |
| Baudouin I King of the Belgians | |
| Template:Country data Brazilian military government | Artur da Costa e Silva President of Brazil |
| Pierre Trudeau Prime Minister of Canada | |
| François Tombalbaye President of Chad | |
| Eduardo Frei Montalva President of Chile | |
| Chiang Kai-shek President of the Republic of China | |
| Carlos Lleras Restrepo President of Colombia | |
| Template:Flagd Congo-Kinshasa | Joseph-Desiré Mobutu President of the Democratic Republic of the Congo |
| José Joaquín Trejos Fernández President of Costa Rica | |
| Makarios III President of Cyprus | |
| Template:Country data Dahomey | Émile Derlin Zinsou President of Dahomey |
| Frederik IX King of Denmark | |
| Joaquin Balaguer President of the Dominican Republic | |
| José María Velasco Ibarra President of Ecuador | |
| Ernst JaaksonConsul General of Estonia to the United States | |
| Haile Selassie I Emperor of Ethiopia | |
| Akwasi AfrifaHead of state of Ghana | |
| Georgios Zoitakis Regent of Greece[lower-alpha 3] | |
| Template:Flagd Guyana | Forbes Burnham Prime Minister of Guyana |
| Kristjan EldjarnPresident of Iceland | |
| Indira Gandhi Prime Minister of India | |
| Template:Country data Pahlavi Iran | Mohammad Reza Pahlavi Shah of Iran[4] |
| Éamon de ValeraPresident of Ireland | |
| Zalman ShazarPresident of Israel | |
| Giuseppe SaragatPresident of Italy | |
| Félix Houphouët-BoignyPresident of Ivory Coast | |
| Hugh Shearer Prime Minister of Jamaica | |
| Eisaku Satō Prime Minister of Japan | |
| Jomo KenyattaPresident of Kenya | |
| Sisavang VatthanaKing of Laos | |
| Anatols DinbergsAmbassador of Latvia to the United States | |
| Charles HelouPresident of Lebanon | |
| Leabua Jonathan Prime Minister of Lesotho | |
| William TubmanPresident of Liberia | |
| Philibert TsirananaPresident of Madagascar | |
| Unknown; the message is not signed.[lower-alpha 4] | |
| Unknown; the message is not signed.[lower-alpha 5] | |
| Moussa TraoréPresident of Mali | |
| Giorgio Borg Olivier Prime Minister of Malta | |
| Template:Flagd Mauritius | Seewoosagur Ramgoolam Prime Minister of Mauritius |
| Gustavo Díaz OrdazPresident of Mexico | |
| Hassan IIKing of Morocco | |
| JulianaQueen of the Netherlands | |
| Keith Holyoake Prime Minister of New Zealand | |
| Anastasio Somoza DebaylePresident of Nicaragua | |
| Olav V King of Norway | |
| Yahya KhanPresident of Pakistan | |
| Bolívar Urrutia ParrillaPresident of Panama | |
| Juan Velasco AlvaradoPresident of Peru | |
| Ferdinand MarcosPresident of the Philippines | |
| Jerzy Michałowski (pl)Ambassador of Poland to the United States | |
| Template:Country data Estado Novo (Portugal) | Américo TomásPresident of Portugal |
| Nicolae CeaușescuPresident of the State Council of Romania and General Secretary of the Romanian Communist Party | |
| Léopold Sédar SenghorPresident of Senegal | |
| Template:Flagd Sierra Leone | Siaka Stevens Prime Minister of Sierra Leone |
| Jacobus Johannes FouchéState President of South Africa | |
| Template:Country data Third Republic of Korea | Park Chung HeePresident of the Republic of Korea |
| Nguyễn Văn ThiệuPresident of the Republic of Vietnam | |
| Sobhuza IIKing of Swaziland | |
| Unknown; the message is not signed.[lower-alpha 6] | |
| Gnassingbé EyadémaPresident of Togo | |
| Eric Williams Prime Minister of Trinidad and Tobago | |
| Habib BourguibaPresident of Tunisia | |
| Cevdet SunayPresident of Turkey | |
| Elizabeth II Queen of the United Kingdom[lower-alpha 7] | |
| Template:Country data Upper Volta | Sangoulé LamizanaPresident of Upper Volta |
| Jorge Pacheco ArecoPresident of Uruguay | |
| Pope Paul VISovereign of the Vatican City State | |
| Template:Country data Socialist Federal Republic of Yugoslavia | Josip Broz TitoPresident of Yugoslavia |
| Kenneth KaundaPresident of Zambia |