Ethereal Skies: Noctilucent Clouds and the Crescent Moon

Prepare to be mesmerized by a celestial ballet! Our planet's upper atmosphere recently put on a stunning show with the appearance of late-season noctilucent clouds, serenely accompanied by the gentle glow of a crescent moon. Captured from Björköby in the Korsholm municipality of Finland, this breathtaking scene reminds us of the subtle wonders that unfold above us.

What are Noctilucent Clouds?

Often referred to as 'night-shining clouds', noctilucent clouds are the highest clouds in Earth's atmosphere, forming at altitudes of about 76 to 85 kilometers (47 to 53 miles) in the mesosphere. They are composed of tiny ice crystals and become visible when they are illuminated by sunlight from below the horizon, after the sun has set for observers on the ground. This creates their characteristic silvery-blue, wispy appearance against the darkening sky.

A Photographer's Dream

The image above is a testament to the beauty of atmospheric phenomena and the skill of the photographer. The delicate tendrils of the noctilucent clouds, illuminated by the lingering sunlight, create an otherworldly landscape. Against this backdrop, the slender crescent moon adds a touch of familiar celestial grace, creating a scene that is both awe-inspiring and deeply tranquil.

Technical Details of the Capture

This stunning image was achieved using advanced camera equipment and careful settings:

• First shot: Canon EOS R6 with a Canon EF 100-400mm f/4.5-5.6 L IS II lens, set at 135mm, with an exposure of 2.5 seconds at f/5 and ISO 500.
• Second shot: Canon EOS R6 with the same Canon EF 100-400mm f/4.5-5.6 L IS II lens, zoomed to 400mm, exposed for 1.3 seconds at f/5.6 and ISO 1250.
• Third shot: Canon EOS 6D with a Canon EF 24-105mm f/3.5-5.6 IS STM lens, focused at 30mm, with a longer exposure of 10 seconds at f/8 and ISO 400.

These settings highlight the photographer's dedication to capturing the subtle details of these elusive clouds and the interplay of light with the lunar crescent.

Experience the Magic

While this particular display has passed, keep an eye on the twilight skies during the warmer months in the Northern Hemisphere for your chance to witness the magic of noctilucent clouds yourself. They are a truly unforgettable sight!