In 1960, American physicist Freeman Dyson proposed the idea that an extremely advanced—and power-hungry—alien civilization could, in theory, harness the majority of their host star’s energy by building a vast structure around it to absorb its radiation.
Scientists in the field of SETI (Search for Extraterrestrial Intelligence) have carried out a number of searches for such structures, known as Dyson spheres—which could be constructed using material harvested from dismantled planets—without uncovering any compelling evidence for them.
Now, in a paper published in The Astrophysical Journal, researchers from Uppsala University, Sweden, and Heidelberg University, Germany, have proposed a new way to look for Dyson spheres that may have some advantages over previous attempts.