Science
the imaginary lines which divide the earth into areas of 15º are called

longitude lines

longitude lines. Imaginary lines, also called meridians, running vertically around the globe. Unlike latitude lines, longitude lines are not parallel. Meridians meet at the poles and are widest apart at the equator. Zero degrees longitude (0) is called the prime meridian.

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“But you, my Lord, are a God of compassion and mercy; you are very patient and full of faithful love.” — Psalm 86:15 ❤

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I’m not really sure: It is capable of changing over time(?)