and Canada, including the sites of major star parties. There are charts for thousands of locations in the U.S. A chart for a particular location uses rows of colored squares to indicate cloud cover, transparency, and seeing. It assembles data from the Canadian Meteorological Centre into a stargazing forecast spanning 180 hours.
The first place many astronomers turn for observing forecasts is Attila Danko’s Clear Sky Charts.
Astronomy Stargazing Forecast Sites & Apps We can, however, at least get the information we need to decide if the skies will be good enough to set up a telescope at a dark site-or even in the backyard. “Everybody talks about the weather, but nobody does anything about it” - including astronomers.
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