It's not entirely accurate to say that smaller objects *always* orbit larger objects in space. While it's true in many cases, like planets orbiting stars, the real reason is gravity.

Here's a breakdown:

* Gravity: Gravity is a force of attraction between any two objects with mass. The more massive an object, the stronger its gravitational pull.

* Orbiting: An object orbits another when it's pulled by the larger object's gravity but has enough sideways motion to avoid falling directly into it. It's like throwing a ball – if you throw it straight up, it falls back down. But if you throw it sideways with enough force, it will go in a circular path around the Earth.

Why smaller objects often orbit larger ones:

* More Mass, More Pull: The larger object has more mass, so it has a stronger gravitational pull.

* Balancing Forces: For a smaller object to stay in orbit, the pull of the larger object's gravity needs to be balanced by the smaller object's sideways motion.

* Natural Result: The natural outcome of this is that smaller objects will often orbit larger objects because the larger object has a stronger gravitational dominance.

Important to note:

* Binary Systems: There are many cases of two objects of similar mass orbiting each other. For example, two stars can form a binary system.

* Relative Size: It's not about absolute size, but about the relative difference in mass. A small planet can orbit a large star, or a small moon can orbit a large planet.

So, the key takeaway is that it's not the size of the objects that determines who orbits whom, but the difference in their mass and the interplay between gravity and motion.