The “BortleThe “Bortle” scale reaches from 1 to 9, where 1 stands for “excellent dark sky” and 9 for “inner city sky“.
• If you’re interested, check handprint.com for more info on the Bortle categories
• To get an approximate estimation / Bortle-categorisation of your location, you can check lightpollutionmap.info
More” scale reaches from 1 to 9, where 1 stands for “excellent dark sky” and 9 for “inner city sky“.

• If you’re interested, check handprint.com for more info on the BortleThe “Bortle” scale reaches from 1 to 9, where 1 stands for “excellent dark sky” and 9 for “inner city sky“.
  • If you’re interested, check handprint.com for more info on the Bortle categories
  • To get an approximate estimation / Bortle-categorisation of your location, you can check lightpollutionmap.info
  More categories
• To get an approximate estimation / Bortle-categorisation of your location, you can check lightpollutionmap.info