Three variables determine your window: time of year, time of night, and moon phase. LightCast StarCast calculates where they overlap for your location, tonight.
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The galactic core is only visible during part of the year. Outside the season window, it's below the horizon during usable hours regardless of how dark or clear the sky is. Getting the season right is the first filter.
Your usable shooting window each night is the overlap between three conditions: astronomical twilight has ended, the moon is below the horizon, and the galactic core is above the horizon at a useful altitude. All three have to be true simultaneously. Some nights that window is four hours. Some nights it's forty minutes. StarCast shows the exact window for your location.
Dark window timing · Moon phase & position · Core visibility
Push notifications · Saved locations · 3-day outlook
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