'Red sky at night, sailors' delight.'
A red sky during sunset and sunrise is caused by small particles trapped high pressure in the atmosphere. The particles cause the refractive index to shift causing the sky to appear red. A red sky at night implies a high pressure system is moving in from the west (and a low pressure system has passed to the east) and the following day will likely be dry and sunny. 
The inverse is true with a red sky during sunrise and 'sailors take warning'.
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  • travelinggeologist'Red sky at night, sailors' delight.'
    A red sky during sunset and sunrise is caused by small particles trapped high pressure in the atmosphere. The particles cause the refractive index to shift causing the sky to appear red. A red sky at night implies a high pressure system is moving in from the west (and a low pressure system has passed to the east) and the following day will likely be dry and sunny.
    The inverse is true with a red sky during sunrise and 'sailors take warning'.

  • maidapoggiVery very interesting!
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