This is a list of notable interstellar radio messages (IRMs) transmitted from Earth. Many of these were sent in the aim of searching for extra-terrestrial intelligence (SETI), and are often called 'active SETI' or 'METI' (Messages to Extra-Terrestrial Intelligence) projects.
Notable transmissions Stars to which messages were sent include:
Target Distance (ly) Sent Expected Arrival Message Messier 13 25,000 25974 Arecibo messageAltair16.72000Message to Altair (CALL to the COSMOS'83) 16 Cyg A 69 2068 Cosmic Call 1 15 Sge 57 2056 HD 178428 67 2066 Gl 777 52 2051 HD 197076 68 2069 Teen Age Message 47 UMa 46 2047 37 Gem 56 2057 HD 126053 57 2058 HD 76151 55 2052 HD 193664 57 2058 Gliese 49 32 2036 Cosmic Call 2Gliese 208 37 2040 55 Cnc 41 2044 HD 10307 41 2044 47 UMa 46 2049 Polaris 433 2439 Across the Universe Gliese 581 20.3 2029 A Message From Earth Gliese 581 20.3 2030 Hello From EarthTZ Arietis14.62024RuBisCo Stars (RuBisCO genetic sequence)Teegarden's Star12.52021Kappa¹ Ceti29.82039HIP 345111402152Wow! Signal Reply37 Gem (HIP 33277)572069HIP 43587412053Gliese 52617.62031Lone Signal Polaris 433 2450 A Simple Response to an Elemental Message Luyten b 12.36 2030 Sónar Calling GJ273b2031
Other projects Some other projects include:
Poetica Vaginal () Discovery Channel Message (2005) Craigslist Messages (2005) CNES Cosmic Connexion (2006) Doritos Advert (2008) Sent Forever Penguin UK
Whilst not an interstellar message, it is also worth mentioning The Morse Message (1962),An Awkward History of Our Space Transmissions which was sent to Venus.
References
External links Classification of interstellar radio messages Who Speaks for Earth? Earth calling: A short history of radio messages to ET Interstellar Radio Messages SETI: Terminating the transmission Self-Decoding Messages Breakthrough Message