light pollution


Definition of light pollution

: artificial skylight (as from city lights) that interferes especially with astronomical observations

Examples of light pollution in a Sentence

Recent Examples on the Web But as correspondent Serena Altschul reports, our skies are becoming marred by light pollution and, increasingly, orbiting satellites. CBS News, "This week on "Sunday Morning" (September 13)," 10 Sep. 2020 The park turned not only to technology but also to creativity to support its efforts to combat light pollution. Harun MehmedinoviĆ, National Geographic, "Photographing Death Valley’s starry skies shines a light on pollution," 24 Aug. 2020 The honor is given by the International Dark Sky Association, an advocacy group that aims to protect natural places from light pollution caused by human activity. Sean P. Means, The Salt Lake Tribune, "East Canyon State Park given international ‘dark sky’ recognition," 28 Aug. 2020 How could Lick compete with the likes of the Hubble Space Telescope, which orbits far above both light pollution and smog? Matt Simon, Wired, "A California Wildfire Nearly Destroyed the Historic Lick Observatory," 26 Aug. 2020 Observatories, already sited in remote locations to avoid light pollution, will have no way to avoid their effects, Phil Puxley of the Association of Universities for Research in Astronomy says. Daniel Clery, Science | AAAS, "Report suggests ways to avoid satellites ruining telescope images but ‘there is no place to hide’," 25 Aug. 2020 After dark: Astronomy April is Global Citizen Science Month, and one way to get involved without leaving your own backyard is by participating in Globe at Night, a campaign to raise awareness about the negative effects of light pollution. Emily Matchar, Smithsonian Magazine, "LeVar Burton Reads Stories on Twitter and Other Livestream Learning Opportunities This Week," 6 Apr. 2020 The viewing experience is less ideal in cities due to interference from light pollution, so if possible, make your way out to the countryside. Joshua Bote, USA TODAY, "The Perseids are the best meteor shower of the summer. Here's how to watch.," 10 Aug. 2020 Get away from light pollution and experience the magic of the night sky. Luann Gibbs, The Enquirer, "Things to do in Cincinnati this week: Aug. 10-16," 12 Aug. 2010

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light pollution.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of light pollution

1968, in the meaning defined above

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Time Traveler for light pollution

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The first known use of light pollution was in 1968

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Statistics for light pollution

Last Updated

13 Sep 2020

Cite this Entry

“Light pollution.” Dictionary, Merriam-Webster, Accessed 21 Sep. 2020.

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More Definitions for light pollution

light pollution


English Language Learners Definition of light pollution

: light from cities, vehicles, etc., that makes it difficult to see things in the sky (such as stars) at night

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