List of interstellar radio messages

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	A Message to Altair (CALL to the COSMOS'83) ^[1]^[2]
16 Cyg A	69	24 May 1999	2068	Cosmic Call 1
15 Sge	57	30 June 1999	2056
?	67	30 June 1999	2066
Gl 777	52	1 July 1999	2051
?	68	29 August 2001	2069	Teen Age Message
47 UMa	46	3 September 2001	2047
37 Gem	56	3 September 2001	2057
?	57	3 September 2001	2058
?	51	4 September 2001	2052
?	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)^[3]
Teegarden's Star	12.5	9 November 2009	2021
Kappa¹ Ceti	29.8	10 November 2009	2039
HIP 34511	140^[4]	15 August 2012	2152	Wow! Signal Reply^[5]
37 Gem (HIP 33277)	57^[6]	15 August 2012	2069
HIP 43587	41^[7]	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^[8]
Luyten b	12.36	16 October 2017	2030	Sónar Calling GJ273b^[9]^[10]
Luyten b	12.36	14 May 2018	2031	Sónar Calling GJ273b^[9]^[10]

Other projects

Some other projects include:

Poetica Vaginal (1986)^[11]^[12]
Discovery Channel Message (2005)^{[citation needed]}
Craigslist Messages (2005)^[13]^[14]
CNES Cosmic Connexion (2006)^[15]
Doritos Advert (2008)^[16]
Sent Forever^[17]
Penguin UK^[18]

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

References

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

External links

[1] NAGAUCHI, Yosuke (12 May 2008). "【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)". MSN産経ニュース (MSN Sankei News) (in Japanese). Archived from the original on 17 May 2008. Retrieved 18 February 2025.

[2] Endo, Kazuki (20 August 2023). "'Anybody there?' Astronomers waiting for a reply from Altai". The Asahi Shimbun. Retrieved 18 February 2025.

[3] Chandler, David L. (24 November 2009), ET: Check your voicemail, MIT News

[4] "HIP 34511". simbad.u-strasbg.fr. Retrieved 18 February 2025.

[5] Memmott, Mark (15 August 2012). "Will E.T. Hear Us? Reply To 'WOW! Signal' Gets Beamed Into Space Today". NPR. Retrieved 18 February 2025.

[6] "HIP 33277". simbad.u-strasbg.fr. Retrieved 18 February 2025.

[7] "HIP 43587". simbad.u-strasbg.fr. Retrieved 18 February 2025.

[8] "A Simple Response". European Space Agency official website. 28 July 2016. Retrieved 6 October 2016.

[Economist-2017-9] "How to send a message to another planet". The Economist. 16 November 2017. Retrieved 19 November 2017.

[Sónar-10] "Sónar Calling GJ 273b". Sónar Calling. Sónar Music Festival. Retrieved 1 May 2021.

[:0-11] "BIOMEDIALE". 13 February 2009. Archived from the original on 13 February 2009. Retrieved 9 March 2024.

[12] Gibbs, W. Wayt (1 April 2001). "Art as a Form of Life". Scientific American. doi:10.1038/scientificamerican0401-40. Archived (PDF) from the original on 20 June 2024. Retrieved 2 April 2025.

[13] Deep Space Network Frequently Asked Questions, Deep Space Communications Network, archived from the original on 4 January 2010

[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 13 May 2010

[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 2 March 2010

[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 11 February 2010

[19] An Awkward History of Our Space Transmissions

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List of interstellar radio messages

List of interstellar radio messages

List of interstellar radio messages

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List of interstellar radio messages

Notable transmissions

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References

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