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The Bortle Scale

The Bortle scale is a nine-level numeric scale that measures the night sky’s brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution. John E. Bortle created the scale and published it in the February 2001 edition of Sky & Telescope magazine to help amateur astronomers evaluate the darkness of an observing site, and secondarily, to compare the darkness of observing sites. The scale ranges from Class 1, the darkest skies available on Earth, through Class 9, inner-city skies.

(Source: Wikipedia)


What if Oregon Territory re-united?


This is Oregon Territory, during a five-year period shortly after the signing of the Oregon Treaty (extending the Canadian border to the Pacific Ocean on the 46th parallel) from 1848 to 1853.

There’s been various proposals to unite with BC as a country called Cascadia, including /r/cascadia. There’s already a national soccer (football) team, so it is to be taken seriously.

I took the liberty of excluding the parts of Montana and Wyoming west of the Continental Divide for the sake of simplicity. This was originally going to be a map of the entire Oregon Country, from the tip of Alaska to the Californian border, but combining statistics and rankings from two different countries (with different measurement systems) was too much work for a quick Reddit post.




Just another day here at the bluecoats


Yooooo I’m in this

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