Why is the ecliptic plane a crucial reference line for solar system architecture?

Answer

Everything orbiting the Sun tends to orbit roughly within this same plane

The ecliptic plane contains Earth’s orbit, and because the solar system formed from a rotating disk, almost all planets, asteroids, and comets orbit within planes very close to this fundamental plane.

Why is the ecliptic plane a crucial reference line for solar system architecture?

#Videos

The Ecliptic: Crash Course Kids #37.2 - YouTube

sunorbitplanetpathecliptic