Red Sky At Night Explained in Fewer than 140 Characters…

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A Twitter challenge applied to a blog…….Well, that could that even be possible….here goes.

A red sky (in the morning or the evening) is a result of high pressured air in the atmosphere trapping a range of dust particles.

But really, a red sky in the morning, or a red sky at night. (That period of time in the morning or evening with the deep reds and pink sky), is made up as a result of high pressure air in the earth’s atmosphere trapping a range of dust particles. The range of air molecules scatter the much shorter blue wavelengths of the suns light, but particles of dusts and other matter will scatter the longer red wavelengths of the suns light in a process known as Rayleigh scattering.

Red_Sky_At_Night
Orange, yellow and red. Perfect sky.

At sunrise and at sunset, the sun is lower in the sky. This then causes the sunlight to travel through more of the atmosphere so therefore scattering more light across the horizon. The red sky at night/red sky in the morning is an effect that is further enhanced when there are high level clouds that will then reflect this light back down to the ground.

A view from Charingworth.

An interesting addition to the above – in French you would say “Ciel rouge le soir laisse bon espoir, Ciel rouge le matin, pluie en chemin.” which is a proverb that translates to “Red sky at night hope in sight; red sky in the morning rain is coming”.

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