These rare glowing ‘space clouds’ are summer’s best-kept skywatching secret
via space.com
Short excerpt below. Read at the original source.
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 […]