SETI SEARCHES FOR ALIEN LIFE IN OVER 1,000 GALAXIES USING UNEXPLORED RADIO FREQUENCIES

Although no aliens were found, the results have helped constrain expectations of possible alien transmitter power

A search of more than 1,300 galaxies for extraterrestrial signals has helped constrain expectations as to how many communicating technological civilisations may exist beyond Earth. Conducted with the Murchison Widefield Array (MWA) in Australia, the search concerned itself with low radio frequencies in the 80 to 300 megahertz (MHz) range. For comparison, SETI, which stands for the Search for Extraterrestrial Intelligence, typically looks for alien signals in the 1,420 MHz hydrogen emission frequency. In fact, low frequencies are relatively unexplored for SETI. The search was conducted by Chenoa Tremblay of the SETI Institute in California and Steven Tingay, the director of the MWA from Australia’s Curtin University. The team focused on a 30-degree field of view in the constellation of Vela, the Sails, encompassing 2,880 galaxies. The redshifts – and hence…

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All About Space (Digital) - 1 Issue, No. 161

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