The Milky Way galaxy doesn't orbit anything in the traditional sense. Instead, it's part of a larger structure called the Local Group, which is a collection of about 50 galaxies.

The Milky Way and the Andromeda Galaxy (the largest in the Local Group) are gravitationally bound to each other and are moving towards each other. They are expected to collide in about 4.5 billion years.

However, the Milky Way and Andromeda are also moving within the Local Group, orbiting around the center of mass of the group. This movement is much slower than the orbital motion of planets around stars, and the period of this orbit is not definitively known.

Here's a simplified explanation:

* Imagine a group of dancers holding hands and swirling around a central point. This is similar to the Local Group of galaxies.

* Each galaxy, like the Milky Way, is moving within the group while also moving towards other galaxies within the group (like the Milky Way and Andromeda).

* The entire group itself is moving through the universe, but its movement is much slower and more difficult to measure.

In conclusion, the Milky Way is not orbiting a specific object, but it's part of a larger group of galaxies that are all moving within a larger cosmic structure.