Testing the Orbital Mechanics of Giant Mirrors
Researchers are investigating the orbital mechanics of giant space mirrors, which could theoretically be used to terraform planets in habitable zones. The study highlights that radiation pressure from starlight acts like a solar sail, potentially pushing these megastructures out of their intended orbits.
Why it matters
Understanding the physics of megastructures is essential for identifying potential technosignatures of advanced civilizations and evaluating the feasibility of future planetary engineering.
Giant mirrors in space have been a staple of science fiction for decades. But so far there’s been very little work looking at the actual physics behind the concept - possibly because we’re still so far from making them ourselves. Still, they could potentially serve as a passive technosignature, if we manage to find one. In order to do that, though, we have to understand what we’re looking for. That is the purpose of a new paper, available in pre-print on arXiv, by Shauna Sallmen of the University of Wisconsin - LaCrosse, and Eric Korpela of UC Berkeley.
The article focuses on scientific theory and physics without political or social agenda.
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