Science
Bortle Dark-Sky Scale
John E. Bortle
Scale of night sky brightness
ByJohn E. Bortle
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🇬🇧lighted buildings during dark cloudy twilight skyImage
🇪🇸Metropolis at nightImage
🇪🇪Street lightsImage
🇪🇸Barcelona SunsetImage
🇪🇪an aerial view of a city at nightImage
🇩🇪city lights during night timeImage
🇺🇸Bright BroadwayImage
🇺🇸Griffith observatory at blue hourImage
🇬🇧Westminster by nightImage
🇬🇧London's twinkle light streetsImage
🇲🇰A view of a mountain range at nightImage
🇺🇸city skyline across body of water during night timeImage
🇮🇹A night time picture of the colossion in romeImage
🇮🇹VermouthFood
🇪🇸brown building during nighttimeImage
🇺🇸a view of a city at night from a bridgeImageWorld tour
Same vibe, elsewhere
🇫🇷Grand MarnierFood
🇺🇸Light of Time Square.Image
🇺🇸high rise buildings during night timeImage
🇺🇸a view of a city at night from the top of a skyscraperImage
🇺🇸Los Angeles by NightImage
🇺🇸Manhattanhenge on Times SquareImage
🇱🇻Riga Black BalsamFood
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🇺🇸aerial photo of buildings at nightImage
🇮🇸Dark Rye BreadFood
🇹🇹Angostura bittersFood
🇬🇧a large clock tower towering over a cityImage
🇫🇷A parisian street glows during sunset.Image
🇺🇸black lighted high-rise buildingsImage
ðŸ‡ðŸ‡ºSkylarkBook
🇬🇧Big ben and parliament are illuminated at sunset.Image