What is Dark-sky preserve?
{{Use dmy dates|date=May 2020}} [[File:Rise of the Milky Way.jpg|300px|thumb|The [[Paranal Observatory]] in [[Chile]] is a dark-sky preserve, which lets it have good quality astronomical use]] A '''dark-sky preserve''' ('''DSP''') is [[protected area]] without [[light pollution]] created by humans.<ref>{{cite web|url=https://www.canadiangeographic.ca/article/preserving-night-sky-dark-sky-preserves-canada|title=Preserving the night sky: Dark-sky preserves in Canada|date=4 April 2011|last=McMahon|first=Peter|work=[[Canadian Geographic]]|access-date=13 May 2020|archive-date=16 July 2018|archive-url=https://web.archive.org/web/20180716223952/https://www.canadiangeographic.ca/article/preserving-night-sky-dark-sky-preserves-canada|url-status=dead}}</ref> These areas are used to help [[wikt:promote|promote]] [[astronomy]]. Different countries have different programs for making areas dark-sky preserves. The [[International Dark-Sky Association]] (IDA) uses the word ''reserve'' instead of ''park'', or ''preserve'' with their dark-sky preserves. This is so that people don't confuse International Dark Sky Reserves (IDSR) and International Dark Sky Parks (IDSP). In Canada, there is a very strict way to make areas dark-sky preserves. This was based on the work by the [[Royal Astronomical Society of Canada]].<ref>{{cite web|url=https://www.rasc.ca/dark-sky-site-designations|title=Dark-Sky Programs|work=[[Royal Astronomical Society of Canada]]|access-date=13 May 2020|archive-date=17 July 2020|archive-url=https://web.archive.org/web/20200717190640/http://www.rasc.ca/dark-sky-site-designations|url-status=dead}}</ref> The program is based on the amount of light in an area and how much [[skyglow]] there is from cities and towns that are close to it.<ref>{{cite web|url=https://www.jasper.travel/dark-sky/|title=Jasper Dark Sky Preserve|work=Jasper Canada|access-date=13 May 2020}}</ref> Canada's program is the only one in the world that makes areas dark-sky preserves. Outside Canada, when areas are called dark-sky preserves, they are