A fleet of satellites with curved reflectors could act as bright pixels to form images in the sky for advertising, but researchers are concerned about the danger from space debris and the impact on astronomy
Previous proposals for space advertising didn’t make commercial sense – the cost of launching enough satellites, which tend to remain in the correct orbit for only a short amount of time, has been prohibitive for any serious attempts.at the Skolkovo Institute of Science and Technology in Moscow, Russia, and his colleagues think it could now be viable if the mechanics of how the satellites are used as advertising are reassessed.
They propose that a fleet of about 50 satellites equipped with curved reflectors could orbit around the line where day turns to night and reflect the sun’s light to a patch of ground below. They would be arranged to form an image made of bright pixels showing a logo or a basic image. Viewers on the ground would see the constellation move across the sky in around 10 minutes around dawn or dusk, growing from half-moon size to two to three times bigger than the moon at its peak.
To maximise revenue, the satellites would change formation around 25 times to target different locations in a three month period of operation before the satellites run out of fuel and slowly descend towards Earth and – Biktimirov hopes – burn up. But this long descent could be a problem. “The spaceflight risk from debris related to these objects is considerable,” saysof Dark Sky Consulting, a company based in Tucson, Arizona. “Left derelict in orbits with long lifetimes, every single object becomes a potential ‘bullet’ that threatens every other object in similar orbits. Any one might set off a catastrophic cascade of debris generation.
As well as the risk from debris, the reflected light could interfere with important telescopes, both on Earth and in space, including. “Astronomy already contends with the interference from the thousands of satellites already in orbit and faces a future in which that number may be as much as 100 times higher than it is now within a decade. Space advertising will only make this worse,” says Barentine.
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