gen-explain-the-equation-of-time-as-you-would-to-a-capable-stude-e7d5

Explain the equation of time as you would to a capable student, in 3-4 sentences.

The equation of time describes the difference between the time shown on a sundial (apparent solar time) and the time on your clock (mean solar time), which can vary by up to about 16 minutes throughout the year. This happens because Earth's orbit is elliptical rather than circular, causing our planet to speed up and slow down as it orbits the Sun, and because Earth's axis is tilted, which affects how the Sun's east-west motion projects onto the celestial equator. The combined effect of these two factors creates a figure-eight pattern called an analemma if you photograph the Sun at the same clock time throughout the year. In practical terms, this is why a sundial and your watch won't usually agree—they're measuring two different, but related, versions of solar time.