In 1960, legendary physicist Freeman Dyson published his seminal paper 'Search for Artificial Stellar Sources of Infrared Radiation,' wherein he proposed that there could be extraterrestrial civilizations so advanced that they could build megastructures...
"Traditionally, we look for infrared emission from stars to see if they have orbital material warm from the starlight," Wright told Universe Today via email.
Several theoretical models have been proposed by astrophysicists for what their thermal signatures might look like, but these have been rather simple and based on numerous assumptions. Dyson acknowledged that capturing a star's energy was merely one possible motivation for building such a megastructure. For example, several SETI researchers have proposed that a Dyson structure could be used as a stellar engine that could move stars or as a massive supercomputer .
From this, he ventured that civilization might be motivated to gradually build sections of a Sphere to gradually increase their habitable volume around a star.
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