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why is the ol sailor saying “pink sky at night sailors delight, pink sky in the morning sailors warning” so accurate?

Dr. Aris Thorne
Dr. Aris Thorne
Senior Science Editor · Jan 23, 2026 · Updated Apr 13, 2026

Pink or Red sky comes from sunlight going through clouds on the horizion. The saying works where weather mostly moves east to west so clouds on the horizon are likely to be over the viewer if they're to the east (ie in the morning) because they're likely to be moving west, rather than on the hori…

77
Words

1 min
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#191
of 500 in Science

+7%
vs Category Avg

The Short Answer

Pink or Red sky comes from sunlight going through clouds on the horizion. The saying works where weather mostly moves east to west so clouds on the horizon are likely to be over the viewer if they're to the east (ie in the morning) because they're likely to be moving west, rather than on the horizon to the west (ie in the evening) where they've either already passed over the viewer or have formed beyond the viewer.

Analysis

Key Concepts: West, viewer, clouds

This explanation focuses on west, viewer, clouds and spans 77 words across 2 sentences. The depth is typical for Science questions (category average: 72 words), striking a balance between accessibility and completeness.

What This Answer Covers

This is a focused, single-point answer that gets directly to the core of the question without detours.

How This Compares in Science

Ranked #191 of 500 Science questions by answer depth (top 39%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why the ol sailor saying "pink sky at night sailors delight, pink sky in the morning sailors warning" so accurate?

Pink or Red sky comes from sunlight going through clouds on the horizion. The saying works where weather mostly moves east to west so clouds on the horizon are likely to be over the viewer if they're to the east (ie in the morning) because they're…

How detailed is this explanation compared to similar Science questions?

This is an above-average answer at 77 words, ranked #191 of 500 Science questions by depth. The key concepts covered are west, viewer, clouds.

What approach does this answer take to explain the ol sailor saying "pink sky at night sailors delight, pin?

The explanation uses root cause analysis across 77 words. It is categorized under Science and addresses the question through 1 analytical lens.