On October 27, 2026, an astronomy picture of the day highlighted noctilucent clouds observed above Sweden. The stunning images were captured during twilight conditions, showcasing these rare atmospheric phenomena. These ice crystal clouds form in the mesosphere, approximately 85 kilometers (53 miles) above Earth’s surface. Scientists believe that increased levels of water vapor in the upper atmosphere are contributing to their formation and visibility. This particular image was presented by a professional astronomer as part of APOD's daily selection.
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