How to read this mapThis map shows where astronomy-specific weather forecasts, or "clear sky charts", are available.
The colors of the markers indicate
amount of light pollution there (colors defined here). You can:
- hover over a colored marker to show the chart's name
- Click on a maker to display a the small version of the chart, and link to the full version
- Click and drag on the map to pan.
- Double click on the map to pan and zoom.
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Even though this map can be zoomed out to show the all of North Americathis page only shows charts in Ontario.
The full list is here.
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