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:

TargetDistance (ly)SentExpected ArrivalMessage
Messier 1325,00016 November 197425974Arecibo message
Altair16.715 August 19832000Message to Altair (CALL to the COSMOS'83) [1][2]
16 Cyg A6924 May 19992068Cosmic Call 1
15 Sge5730 June 19992056
HD 1784286730 June 19992066
Gl 777521 July 19992051
HD 1970766829 August 20012069Teen Age Message
47 UMa463 September 20012047
37 Gem563 September 20012057
HD 126053573 September 20012058
HD 76151554 September 20012052
HD 193664574 September 20012058
Gliese 49326 July 20032036Cosmic Call 2
Gliese 208376 July 20032040
55 Cnc416 July 20032044
HD 10307416 July 20032044
47 UMa466 July 20032049
Polaris4334 February 20082439Across the Universe
Gliese 58120.39 October 20082029A Message From Earth
Gliese 58120.328 August 20092030Hello From Earth
TZ Arietis14.609 November 20092024RuBisCo Stars (RuBisCO genetic sequence)[3]
Teegarden's Star12.509 November 20092021
Kappa¹ Ceti29.810 November 20092039
HIP 34511140[4]15 August 20122152Wow! Signal Reply[5]
37 Gem (HIP 33277)57[6]15 August 20122069
HIP 4358741[7]15 August 20122053
Gliese 52617.620132031Lone Signal
Polaris43310 October 20162450A Simple Response to an Elemental Message[8]
Luyten b12.3616 October 20172030Sónar Calling GJ273b[9][10]
14 May 20182031

Other projects

Some other projects include:

Whilst not an interstellar message, it is also worth mentioning The Morse Message (1962),[19] which was sent to Venus.

References

  1. ^ NAGAUCHI, Yosuke (2008-05-12). "【科学】届け宇宙人への電子メール ２５年前に送信、７年後にも返信来る！？ (1/2ページ)" (in Japanese). MSN産経ニュース (MSN Sankei News). Archived from the original on 2008-05-17. Retrieved 2025-02-18.
  2. ^ Endo, Kazuki (August 20, 2023). "'Anybody there?' Astronomers waiting for a reply from Altai". The Asahi Shimbun. Retrieved February 18, 2025.
  3. ^ Chandler, David L. (24 November 2009), "ET: Check your voicemail", MIT News
  4. ^ "HIP 34511". simbad.u-strasbg.fr. Retrieved 2025-02-18.
  5. ^ Memmott, Mark (2012-08-15). "Will E.T. Hear Us? Reply To 'WOW! Signal' Gets Beamed Into Space Today". NPR. Retrieved 2025-02-18.
  6. ^ "HIP 33277". simbad.u-strasbg.fr. Retrieved 2025-02-18.
  7. ^ "HIP 43587". simbad.u-strasbg.fr. Retrieved 2025-02-18.
  8. ^ "A Simple Response". European Space Agency official website. 28 July 2016. Retrieved 6 October 2016.
  9. ^ "How to send a message to another planet". The Economist. 16 November 2017. Retrieved 19 November 2017.
  10. ^ "Sónar Calling GJ 273b". Sónar Calling. Sónar Music Festival. Retrieved 1 May 2021.
  11. ^ "BIOMEDIALE". 13 February 2009. Archived 2009-02-13 at the Wayback Machine. Retrieved 2024-03-09.
  12. ^ Gibbs, W. Wayt (2001-04-01). "Art as a Form of Life". Scientific American. doi:10.1038/scientificamerican0401-40. Archived 2024-06-20 at the Wayback Machine. Retrieved 2025-04-02.
  13. ^ "Deep Space Network Frequently Asked Questions", Deep Space Communications Network, archived from the original on 2010-01-04
  14. ^ "List in Space: Calling the Cosmos Gets Commercial", Space_com, 23 March 2005
  15. ^ "Connecting with the Cosmos", CNES, 26 January 2006, archived from the original on 2010-05-13
  16. ^ "Doritos Makes History With World's First ET Advert", Spacedaily.com, 13 June 2008
  17. ^ Harris, Mark (16 September 2009), "Is Sent Forever the worst Apollo 11 tie-in?", TechRadar, archived from the original on 2010-03-02
  18. ^ Colvile, Robert (9 February 2010), "Calling ET: Your chance to send a message to alien life", The Daily Telegraph, archived from the original on 2010-02-11
  19. ^ An Awkward History of Our Space Transmissions