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A Clue About Longitude Clues
Why They Only Work on the Equinox

On the spring (vernal) equinox in March, you will receive a set of longitude clues. Here's how the Earth will look from space on that day. What do you notice? What do you wonder? Let's compare this to how the earth looks on other days of the year.

March: 24 hours on the Spring Equinox
The Living Earth® image is a composite of Earth satellite imagery developed by The Living Earth, Inc.
From: The Earth and Moon Viewer