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Losing the night
https://popastro.com/forum/viewtopic.php?f=9&t=21060
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Author:  brian livesey [ Tue Feb 26, 2019 12:10 pm ]
Post subject:  Losing the night

A Radio 4 programme yesterday evening discussed the problem of light pollution, and the disappearance of night for millions of people around the globe.
We were informed that global light pollution is increasing at the rate of 2% per year, which is a rapid rate of growth. A third of humanity can no longer see the Milky Way.
The programme also discussed the effects of light pollution on plant growth and the circadian rhythms of animals, including the psychological and cultural effects on we humans of being deprived of the night.

Author:  skyhawk [ Tue Feb 26, 2019 5:08 pm ]
Post subject:  Re: Losing the night

brian livesey wrote:
A Radio 4 programme yesterday evening discussed the problem of light pollution, and the disappearance of night for millions of people around the globe.
We were informed that global light pollution is increasing at the rate of 2% per year, which is a rapid rate of growth. A third of humanity can no longer see the Milky Way.
The programme also discussed the effects of light pollution on the circadian rhythms of plants and animals, including the psychological and cultural effects on humans of being deprived of the night.



Old news,

JANUARY 17, 2019 BY EVAN GOUGH
Astronomers Aren’t Pleased About a Russian Plan to Put Billboards in Space
It was bound to happen.

While the rest of us look up at the night sky, and wonder at what we’re seeing, ponder how it all fits together, and strain ourselves trying to understand how our origins are intertwined with all that we see, others don’t. They look up at the magnitude of the night sky and think none of these things.

Instead they think, “Hmmm…that’s a big, empty billboard. How can I make money from it?”

Russian company StartRocket is proposing to use Cubesats, small satellites with inexpensive launch profiles, to put billboards in space. At an altitude of about 450 km (280 miles), the satellites would unfurl a mylar sail about 9 meters (30 ft.) long. A group of CubeSats would work together to create a singe billboard, and the result would be a pixelated billboard with a viewable area of about 50 sq. km., visible in morning and evening twilight, when they catch and reflect sunlight.

from there to LIT displays by china etc.

Author:  brian livesey [ Wed Feb 27, 2019 11:36 am ]
Post subject:  Re: Losing the night

A third of the population can't see the Milky Way. The next third looks down at its smartphones, unaware that the sky exists at all. The final third is too busy trying to keep up with the bills to find the time to "stand and stare" at the sky.
We skywatchers are definitely a privileged social minority.

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