The galaxy’s coldest “stars” may actually be alien megastructures

Scientists have uncovered new clues that could reveal one of astronomy's most tantalizing mysteries: Dyson spheres, hypothetical megastructures built by advanced civilizations to harvest stellar energy. According to ScienceDaily, researchers found that red dwarfs and white dwarfs would be the most promising places to look, since these smaller, cooler stars would be easier for aliens to exploit. The structures would give themselves away through telltale signs—glowing in infrared rather than visible light, lacking the dusty halos of natural stars, and possibly displaying unusual flickering patterns.

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