Clever extraterrestrials might have constructed huge solar energy vegetation round their host stars. The hunt for his or her telltale glow is hotting up
27 January 2021
THERE comes a degree at which any superior alien civilisation value its salt has to dismantle a neighbouring planet for spare elements. This isn’t an act of vandalism, you perceive, however fairly a precursor to constructing an infinite solar power plant that surrounds its whole host star. What else would an bold alien society do to proceed its growth? How else would it not meet its ever-increasing demand for vitality?
This situation, or one thing prefer it, is the founding precept of the seek for alien megastructures, which on this case would look one thing like darkish embers when seen via infrared telescopes. The search started in 1960, when physicist Freeman Dyson proposed it as a manner of discovering alien life. Greater than 60 years later, the hunt for Dyson spheres, as they’re now identified, stays a minority sport amongst these concerned in the search for extraterrestrial intelligence (SETI), an enterprise that has centered totally on listening for radio alerts from different worlds.
However astronomers are nonetheless prospecting for proof of alien engineering. Particularly, they’ve been working to place the pursuit of Dyson spheres on a rigorous scientific footing. Now, they’re poring over essentially the most exact cosmic cartography ever produced to attempt to discover stars that may very well be surrounded by swarms of photo voltaic panels and distinguish them from naturally occurring infrared herrings. They’re already narrowing down candidates. They’ve even begun to suppose critically concerning the last hurdle: methods to inform the distinction between an infrared herring and a real alien megastructure.
Dyson’s authentic proposal was fairly broad. In a one-page paper, he advised merely …