Wikipedia
Astrolinguistics is a type of linguistics that is closely connected with the Search for ExtraTerrestrial Intelligence (SETI).
An integral part of the SETI project in general is research in the field of the construction of messages for ETI, possibly to be transmitted into space from Earth. As far as such messages are based on linguistic principles, the research can be considered to belong to astrolinguistics. The first proposal in this field was put forward by the mathematician Hans Freudenthal, University of Utrecht in the Netherlands, in 1960 – around the time of the first SETI effort at Greenbank in the US. Freudenthal conceived a complete Lingua Cosmica. His book LINCOS, Design of a Language for Cosmic Intercourse seems at first sight non-linguistic, because mathematical concepts are the core of the language. The concepts are, however, introduced in conversations between persons (Homo sapiens), de facto by linguistic means. This is witnessed by the innovative examples presented. The book set a landmark in astrolinguistics. This was witnessed by Bruno Bassi's review years later in Wikipedia. Bassi noted: “LINCOS is there. In spite of its somewhat ephimeral 'cosmic intercourse' purpose it remains a fascinating linguistic and educational construction, deserving existence as another Toy of Man's Designing”. The concept Astrolinguistics in scientific research was coined as such, also with a view towards message construction for ETI, in 2013 in the monograph Astrolinguistics, Design of a Linguistic System for Interstellar Communication Based on Logic, written by the astronomer and computer scientist Alexander Ollongren, University of Leiden, The Netherlands. This book presents a new Lingua Cosmica totally different from Freudenthal's design. It describes the way the logic of situations in human societies can be formulated in the lingua, also named LINCOS. This astrolinguistic system, also designed for use in interstellar communication, is based on modern Constructive Logic – which assures that all expressions are verifyable. At a deeper, more fundamental level, however, astrolinguistics is concerned with the question whether linguistic universalia can be identified which are potentially useful in communication across interstellar distances between intelligence species. In the view of the new LINCOS these might be certain logic descriptions of specific situations and relations(possibly in an Aristotelian sense). Kadri Tinn's (Astronomy for Humans) review of Ollongren's book recognised that aspect – she wrote: