Mirrors in space could disrupt human sleep, scientists warn
This would create the ability to light up a local area ‘to boost solar energy production’. It sounds like another expensive and complicated way to generate electricity. Objecting researchers say on-demand daylight could affect humans’ sleep, among other issues in nature, farming etc.
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Officials in the US are considering plans by Reflect Orbital, an aerospace start-up, to illuminate parts of the Earth at night using reflective satellites, as well as from Elon Musk’s SpaceX to put up to one million more satellites in Earth’s low orbit, says The Telegraph (via Yahoo News).
However, the presidents of four international scientific groups, representing about 2,500 researchers from more than 30 countries, are among those to write to the US government with concerns.
The letter, written by the presidents of the European Biological Rhythms Society (EBRS), the Society for Research on Biological Rhythms, the Japanese Society for Chronobiology and the Canadian Society for Chronobiology, said: “The proposed scale of orbital deployment would represent a significant alteration of the natural night-time light environment at a planetary scale.”
The experts warned the Federal Communications Commission (FCC), which regulates satellites and space policy, that altering the natural rhythm of light and dark could have untold consequences on biological clocks that regulate sleep, and hormone secretion in humans and animals.
They also warned that it could impact migration of nocturnal species, seasonal cycles in plants and the rhythms of marine phytoplankton that underpin ocean food webs.
They urged the FCC and other regulators to conduct a full environmental review and set limits on satellite reflectivity and cumulative night sky brightness.
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The proposals by Reflect Orbital involve using satellites equipped with large mirrors to redirect sunlight back on to Earth “on demand”.
The idea would be to light up an area of five to six kilometres to boost solar energy production, provide lighting for construction projects, disaster responses and agriculture, the company says. The brightness would be adjustable “from full moon to full noon”.
Full article here.
Source: https://tallbloke.wordpress.com/2026/04/08/mirrors-in-space-could-disrupt-human-sleep-scientists-warn/
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