A new astronomy photo captures rare noctilucent clouds shining over Sweden. These high-altitude clouds glow brightly long after sunset.
A beautiful image shows rare clouds over Sweden. These clouds shine bright in the night sky. They appeared near the city of Linköping during August.
Also, these formations are known as noctilucent clouds. Experts call them polar mesospheric clouds. They float very high in the atmosphere.
Next, you might wonder how they stay visible at night. The ground experiences darkness while the air remains lit. Sunset happens on the ground first.
Meanwhile, sunlight still hits the high clouds from below the horizon. This light makes the clouds glow in the dark. They look blue against the night sky.
After that, the image shows a lovely green field. Dark trees stand out against the horizon. The clouds float far above this landscape.
Still, these clouds are usually too faint to see. They only appear during the summer months. They catch the sunlight after the sun goes down.
However, scientists still study these strange clouds today. Researchers learned much about them in the last twenty years. They want to understand how the clouds form.
Finally, experts continue to track how they change over time. These clouds remain a subject of active scientific research. They offer a unique look at our atmosphere.