A team of astronomers combed through a collection of odd stars that are candidates for Dyson spheres — artificial constructs designed by aliens to leech energy from stars. Instead, the scientists found, the weird stars are more likely to be"hot DOGs" — hot dust-obscured galaxies.
First proposed in the 1960s by physicist Freeman Dyson, these hypothetical constructs would essentially be enormous shells that wrap around stars, absorbing as much light energy as possible. In Dyson's theory, the material used to construct these spheres would come from disassembled planets in that star's system.
To us, that would make a Dyson sphere appear as a star with a lot more infrared radiation than normal. In the latest search, the astronomers identified seven stars within 1,000 light-years of Earth that emit an abnormally large amount of infrared radiation, making them Dyson sphere candidates.But in a more recent study published to the preprint server arXiv in May, a new team of astronomers examined those seven candidates in greater detail.
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