List of interstellar radio messages


This is a list of notable interstellar radio messages 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' projects.

Notable transmissions

Stars to which messages were sent include:
TargetDistance SentExpected ArrivalMessage
Messier 1325,00016 11 197425974Arecibo message
Altair16.72000Message to Altair
16 Cyg A6924 05 19992068Cosmic Call 1
15 Sge5730 06 19992056Cosmic Call 1
HD 1784286730 06 19992066Cosmic Call 1
Gl 7775201 07 19992051Cosmic Call 1
HD 1970766829 08 20012069Teen Age Message
47 UMa4603 09 20012047Teen Age Message
37 Gem5603 09 20012057Teen Age Message
HD 1260535703 09 20012058Teen Age Message
HD 761515504 09 20012052Teen Age Message
HD 1936645704 09 20012058Teen Age Message
Gliese 493206 07 20032036Cosmic Call 2
Gliese 2083706 07 20032040Cosmic Call 2
55 Cnc4106 07 20032044Cosmic Call 2
HD 103074106 07 20032044Cosmic Call 2
47 UMa4606 07 20032049Cosmic Call 2
Polaris43304 02 20082439Across the Universe
Gliese 58120.309 10 20082029A Message From Earth
Gliese 58120.328 08 20092030Hello From Earth
TZ Arietis14.62024RuBisCo Stars
Teegarden's Star12.52021RuBisCo Stars
Kappa¹ Ceti29.82039RuBisCo Stars
HIP 345111402152Wow! Signal Reply
37 Gem (HIP 33277)572069Wow! Signal Reply
HIP 43587412053Wow! Signal Reply
Gliese 52617.62031Lone Signal
Polaris43310 10 20162450A Simple Response to an Elemental Message
Luyten b12.3616 10 20172030Sónar Calling GJ273b
Luyten b12.362031Sónar Calling GJ273b

Other projects

Some other projects include:
Whilst not an interstellar message, it is also worth mentioning The Morse Message (1962), which was sent to Venus.