List of interstellar radio messages
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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 | 16 November 1974 | 25974 | Arecibo message |
| Altair | 16.7 | 15 August 1983 | 2000 | Message to Altair (CALL to the COSMOS'83) |
| 16 Cyg A | 69 | 24 May 1999 | 2068 | Cosmic Call 1 |
| 15 Sge | 57 | 30 June 1999 | 2056 | |
| HD 178428 | 67 | 30 June 1999 | 2066 | |
| Gl 777 | 52 | 1 July 1999 | 2051 | |
| HD 197076 | 68 | 29 August 2001 | 2069 | Teen Age Message |
| 47 UMa | 46 | 3 September 2001 | 2047 | |
| 37 Gem | 56 | 3 September 2001 | 2057 | |
| HD 126053 | 57 | 3 September 2001 | 2058 | |
| HD 76151 | 55 | 4 September 2001 | 2052 | |
| HD 193664 | 57 | 4 September 2001 | 2058 | |
| Gliese 49 | 32 | 6 July 2003 | 2036 | Cosmic Call 2 |
| Gliese 208 | 37 | 6 July 2003 | 2040 | |
| 55 Cnc | 41 | 6 July 2003 | 2044 | |
| HD 10307 | 41 | 6 July 2003 | 2044 | |
| 47 UMa | 46 | 6 July 2003 | 2049 | |
| Polaris | 433 | 4 February 2008 | 2439 | Across the Universe |
| Gliese 581 | 20.3 | 9 October 2008 | 2029 | A Message From Earth |
| Gliese 581 | 20.3 | 28 August 2009 | 2030 | Hello From Earth |
| TZ Arietis | 14.6 | 9 November 2009 | 2024 | RuBisCo Stars (RuBisCO genetic sequence) |
| Teegarden's Star | 12.5 | 9 November 2009 | 2021 | |
| Kappa¹ Ceti | 29.8 | 10 November 2009 | 2039 | |
| HIP 34511 | 140 | 15 August 2012 | 2152 | Wow! Signal Reply |
| 37 Gem (HIP 33277) | 57 | 15 August 2012 | 2069 | |
| HIP 43587 | 41 | 15 August 2012 | 2053 | |
| Gliese 526 | 17.6 | 2013 | 2031 | Lone Signal |
| Polaris | 433 | 10 October 2016 | 2450 | A Simple Response to an Elemental Message |
| Luyten b | 12.36 | 16 October 2017 | 2030 | Sónar Calling GJ273b |
| 14 May 2018 | 2031 |
Other projects
Some other projects include:
- Poetica Vaginal (1986)
- Discovery Channel Message (2005)[citation needed]
- 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), which was sent to Venus.