An isotropic beacon is a hypothetical type of transmission beacon that emits a uniform EM signal in all directions for the purposes of

communication with extraterrestrial intelligence The communication with extraterrestrial intelligence (CETI) is a branch of the search for extraterrestrial intelligence (SETI) that focuses on composing and deciphering interstellar messages that theoretically could be understood by another techn ...

Isotropic beacons and their relation to SETI

An isotropic beacon can be any transmitter that emits a uniform electromagnetic field. However, the term is most commonly used to describe a transmitter used by a civilization to call attention to itself over interstellar distances to extraterrestrial creatures. The isotropic beacon uses the Kardashev scale. The Kardashev scale is a method of measuring a civilization's level of technological advancement based on the amount of energy it is able to use. The measure was proposed by Soviet astronomer Nikolai Kardashev in 1964. The Kardashev scale has three designated categories, which are a Type I civilization, also called a planetary civilization, that can use and store all of the energy available on its planet. A Type II civilization, also called a stellar civilization, can use and control energy at the scale of its planetary system. A Type III civilization, also called a galactic civilization, can control energy at the scale of its entire host galaxy.

Project Cyclops Project Cyclops is a 1971 NASA project that investigated how SETI should be conducted. As a NASA product the report is in the public domain. The project team created a design for coordinating large numbers of radio telescopes to search for Earth ...

is and was one of the first looks at the theoretical framework of what it would take to create such a device.

References

* Exploratory engineering Hypothetical astronomical objects Search for extraterrestrial intelligence Astronomy projects Hypothetical technology {{astrobiology-stub