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SESK: Stuff Everyone Should Know · sesk.info/astro-ecliptic-suns-path

What does the ecliptic trace on the celestial sphere?

The Sun's apparent yearly path across the sky.

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  1. The Sun's apparent yearly path ✔
  2. The Moon's daily horizon path
  3. Earth's equator projected outward

Why: As Earth orbits the Sun, the Sun appears to move against the background stars. That annual great-circle path is the ecliptic.

Huh, didn't know that: The ecliptic crosses the celestial equator at the two equinox points.

The dad joke
The Sun follows the ecliptic because it likes a well lit route.
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References

Answer: The Sun's apparent yearly path. As Earth orbits the Sun, the Sun appears to move against the background stars. That annual great-circle path is the ecliptic.

  1. The Sky Above openstax.org/books/astronomy-2e/pages/2-1-the-sky-above
    The circle in the sky that the Sun appears to make around us in the course of a year is called the ecliptic.
    Checked 2026-10-10.

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