An orbital node is a point where two things that are moving around each other, like planets or moons, cross paths. It's like a big game of "cross the line" that happens in space. Imagine two people playing catch with a ball. Every time they throw the ball to each other, they cross paths at a certain point. That point is like the orbital node in space. In the same way, as planets or moons orbit around a star or planet, they cross paths at a certain point called the orbital node. It is an important point for scientists to understand as it helps them predict the location and movements of objects in space.