There could be 36 alien civilizations communicating in the Milky Way

According to Professor Christopher Conselice, lead author of the report, “there should be at least a few hundred active CETI civilizations in our galaxy under the premise that it takes 5 billion years for intelligent life to evolve on other planets, as it does. on earth”. . «

“The concept is to observe evolution on a galactic scale. This measurement is known as the Astrobiological Copernican Limit.”

“The classical method for estimating the number of intelligent civilizations relies on making informed assumptions about values related to existence, where opinions on such matters differ very significantly,” said Dr. Tom Westby, first author of the study.

“Our latest research simplifies these assumptions by using new evidence, giving us a reliable estimate of the number of civilizations in our galaxy.”

The two Copernican astrobiological limits are that intelligent life evolves in less than 5 billion years, or after about 5 billion years, similar to how a communicating culture evolved on Earth after 4.5 billion years.

According to the authors’ robust standards, which include a metal content equal to that of the Sun, there should be about 36 active CETI civilizations in the Milky Way.

They illustrate that the number of civilizations largely depends on how long they constantly send signals of their life into space, such as radio transmissions from satellites, television, etc.

If other technological civilizations survive as long as our own, which is currently 100 years old, there will be approximately 36 ongoing intelligent technological civilizations in our Galaxy.

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