Should stargazers also be cloudspotters? Everyone knows clouds are the first thing you see as soon as you get under a dark sky or buy a new telescope — it's almost guaranteed! However, by early July, I usually start actively looking for a special kind of noctilucent or "night shining" cloud — and they can be a magnificent sight to rival anything celestial.
At its core, the search for these so-called "space clouds" is the flip side of the seemingly never-ending twilight in July in mid-northern latitudes of the Northern Hemisphere. You wait all winter for tolerable temperatures, then summer arrives and the night sky never properly commits to darkness. At my latitude, the northern horizon glows all evening in early-to-mid July like somebody forgot to turn the sun off completely. Serious stargazing gets harder as even bright constellations seem washed out by lingering light.
Cue noctilucent clouds. Peer at the northern sky during twilight between late May and August, and you may see strange silver-blue ripples. Delicate yet bright, they can look artificial — thin electric-...
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