http://cosmospnw.com/bortle-scale/ WebApr 11, 2024 · • Consult the Bortle scale, which gives stargazers an idea of how bright the sky will be above a given location. This scale has nine levels. Class 1 is the ultimate dark sky experience, and class 9 is the worst stargazing experience, with a bright sky that means stargazers will see only the brightest stars and planets.
Dark Skies Program - TPWD - Texas
WebApr 6, 2024 · This range of night skies, from dark to bright, was categorized into an easy-to-follow scale by John Bortle as the “Bortle Dark-Sky Scale,” or simply the Bortle scale. It was first introduced in … WebJun 27, 2010 · The Bortle Dark Sky Scale was published in S&T nearly 20 years ago and I believe the magazine's come-on on the cover page said something like, "Rank you own sky's darkness/light pollution". This was also a time before much in the way of any light pollution maps being available, I believe. So there was little need to clarify how the scale … camping sites in north georgia
How to measure the missing stars over your suburban backyard
WebOn the left is a 2024 satellite image of IA showing light pollution from the NOAA National Geophysical Data Center. On the right is a 2015 light pollution map showing sky brightness at the zenith from World Atlas data. Colors correspond approximately to the Bortle scale. Use as a guide to find the darkest sky locations near you. WebBORTLE SCALE INTERPRETATION. The Bortle Scale works to estimate sky brightness and interpret how light pollution is affecting your view of night sky phenomenon. The lower the number is, the better sky … WebDec 5, 2008 · In the February 2001 issue of Sky & Telescope, John Bortle proposed a nine-classDark-Sky Scale based partly on NELM but also on several other criteria, such as the visibility of the Milky Way and whether clouds appear light or dark. (Near a city, clouds are lit up from below, but at a pristine site, clouds are black holes in the bright, starry ... fischer francis