Sending and Searching for Interstellar Messages
Alexander Zaitsev

TL;DR
This paper explores the interconnected strategies of searching for and sending interstellar messages, emphasizing a unified scientific approach to SETI and METI, and addressing cultural and practical challenges.
Contribution
It proposes a combined theoretical and practical framework for SETI and METI, highlighting their interrelation and advocating for a disciplined, unified approach.
Findings
SETI and METI share target star selection strategies.
Time synchronization can optimize interstellar messaging efforts.
Understanding and designing messages enhances interstellar communication.
Abstract
There is a close interrelation between Searching for Extraterrestrial Intelligence (SETI) and Messaging to Extraterrestrial Intelligence (METI). For example, the answers to the questions "Where to search" and "Where to send" are equivalent, in that both require an identical selection from the same target star lists. Similar considerations lead to a strategy of time synchronization between sending and searching. Both SETI and METI use large reflectors. The concept of "magic frequencies" may be applicable to both SETI and METI. Efforts to understand an alien civilization's Interstellar Messages (IMs), and efforts to compose our own IMs so they will be easily understood by unfamiliar Extraterrestrials, are mutually complementary. Furthermore, the METI-question: "How can we benefit from sending IMs, if a response may come only thousands of years later?" begs an equivalent SETI-question:…
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