Shining Forth from the heavens: Rare blue 'night-shining clouds' pictured at dusk over Edinburgh's landmark rail bridge

A photographer caught a glimpse of the most distant clouds in the atmosphere shining an electric blue from 50 miles up as the skies cleared over Edinburgh at dusk this week.

The 'night shining' clouds are normally invisible, but shine at twilight when ice crystals in the high-altitude clouds are lit up by the sun as it sets.

The clouds are especially bright here at the height of Edinburgh's summer.

A photographer in Fife captured the rare clouds over the Forth Rail bridge as the skies cleared after a week of storms.

The clouds are the highest in atmosphere at around 50 miles above the Earth's surface, captured here by photographer Adrian Maricic, from Fife over the Forth Road and rail bridges

Read more: http://www.dailymail.co.uk/sciencetech/article-2166528/Rare-blue-night-shining-clouds-pictured-dusk-Edinburghs-landmark-rail-bridge.html