The best time to see noctilucent clouds is on clear nights between late May and mid-August, about 90 to 120 minutes after ...

Noctilucent or night-shining clouds are rare, high-altitude clouds that glow with a blue, silvery hue at dusk or dawn when the sun shines on them from below the horizon. These ice clouds typically ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...