What is precession?

Precession is when something spins and then slowly changes direction over time, like a top that wobbles before it falls.

Imagine you're holding a spinning toy, maybe one of those round ones that twirl on your finger. When it starts to spin fast, it stands straight up. But as it slows down, it begins to wobble, going around in a circle while it spins. This wobbling motion is called precession.

Think of precession like a slow dance between the toy and gravity. The faster it spins, the more it resists falling over, kind of like how you can balance on one foot when you're moving, but wobble if you stand still. As it loses speed, gravity wins the dance, making it sway in a circular path.

The Earth does this too! It takes about 26,000 years for our planet to complete one full precession cycle, that’s why our seasons shift slightly over time, and why ancient people used stars to track the years.