The fight against light pollutionWith me was a small group of dark-sky activists, including John Barentine, a Tucson-based astronomer and consultant on dark-sky issues. From our vantage point, it was obvious which gas station was the larger emitter of light pollution. But, Barentine explained, both buildings met Tucson’s lighting code. I nodded, feeling depressed about the state of artificial light at night, or ALAN.
In the fight against light pollution, “constituents make a difference,” says Barentine. “What we’re missing is political will. We can reverse light pollution tomorrow. Nobody suffers when we decrease light pollution.” The Loss of Dark Skies Is So Painful, Astronomers Coined a New Term for ItGiven the harmful effects of light pollution, Aparna Venkatesan, a cosmologist at the University of San Francisco, and John Barentine, astronomer and science communicator at Dark Sky Consulting, have coined a new term to help focus efforts to combat it. Their term, as reported in a brief paper in the preprint database arXiv and a letter to the journal Science, is “noctalgia.” In general, it means “sky grief,” and it captures the collective pain we are experiencing as we continue to lose access to the night sky.*
How Light Pollution Threatens Minnesota's Wildlife and Dark SkiesRecorded observations of light’s impact on the environment date back to ancient Rome, when people noticed that their fires affected animal behavior, says John Barentine, an astronomer and freelance dark-sky consultant in Tucson, Arizona. Gas, and later electric, lights altered the appearance of the night sky through the 1800s and into the 1900s, when observatories moved outside of cities to escape sky glow, followed by an accelerated brightening of nighttime as the 20th century went on. Then came light-emitting diodes, or LEDs. A type of semiconductor, LEDs use less energy than other kinds of light bulbs typically used in streetlights and other outdoor fixtures, making their carbon footprint smaller. They last longer and cost less to operate. Those features make LEDs environmentally appealing in many ways, Barentine says, and society embraced them.
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