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  2. Bortle scale - Wikipedia

    en.wikipedia.org/wiki/Bortle_scale

    the zodiacal light is still visible, but does not extend halfway to the zenith at dusk or dawn; light pollution domes visible in several directions; clouds are illuminated in the directions of the light sources, dark overhead; surroundings are clearly visible, even at a distance; the Milky Way well above the horizon is still impressive, but ...

  3. Globe at Night - Wikipedia

    en.wikipedia.org/wiki/GLOBE_at_Night

    Globe at Night is an international scientific research program that crowdsources measurements of light pollution in the night sky. At set time periods within each year, the project asks people to count the number of stars that they can see from their location and report it to the project's website.

  4. Light pollution - Wikipedia

    en.wikipedia.org/wiki/Light_pollution

    Light pollution competes with starlight in the night sky for urban residents, interferes with astronomical observatories, [16] and, like any other form of pollution, disrupts ecosystems and has adverse health effects. [17] [18] [19] Light pollution is a side-effect of industrial civilization. Its sources include building exterior and interior ...

  5. Maps show best areas in U.S. to see northern lights - AOL

    www.aol.com/maps-show-best-areas-u-150216820.html

    Parts of Idaho, South Dakota, Minnesota and Wisconsin may be able to see the lights Friday night. On the East Coast, the aurora might be visible in northern New York and parts of Vermont and New ...

  6. Southeast Minnesota struggles for common ground on nitrate ...

    www.aol.com/news/southeast-minnesota-struggles...

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  7. Sky quality meter - Wikipedia

    en.wikipedia.org/wiki/Sky_Quality_Meter

    The current versions has only one band of observation, that can produce misinterpretations if the light pollution changes from sodium-vapor lamp to LED. [8] The SQM-L, or "Sky Quality Meter - L," is a model with an additional integrated lens, offering a narrower measurement range of 20° compared to the 84° range of the standard SQM model. [9]

  8. Chicago stargazers find more light pollution and wildfires ...

    www.aol.com/sports/chicago-stargazers-more-light...

    Some of Drew Carhart’s earliest memories remind him of his love of nature. Not just trees, flowers or birds — but the stars, planets and galaxies visible in the night sky. Fifty years ago ...

  9. List of Superfund sites in Minnesota - Wikipedia

    en.wikipedia.org/wiki/List_of_Superfund_sites_in...

    This is a list of Superfund sites in Minnesota designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations. [1]