What does the sun revolve around?

Answer

The sun is one of many stars in the Milky Way. Our Milky Way is estimated to contain 100 billion stars. The Milky Way is a flattened disk with spiral arms, itself slowly rotating around its center. This means that the stars of the Milky Way itself revolve around that center. Our sun, and with it the solar system, does the same. The sun is about halfway from the center to the edge. One revolution there takes 250 million years. The speed of the sun, or rather of the solar system, is 250 km/s. In addition, the solar system still moves slightly up and down during that revolution, approximately per revolution.

And what about the Milky Way? Well, galaxies, or rather extragalactic galaxies, come in groups. Such a group is called a cluster. Our galaxy is part of the so-called Locale Group, in which it is the second largest galaxy after the Andromeda Nebula. In addition, the Local Group contains about thirty smaller systems.

As a cluster, the local group itself is part of the Virgo Supercluster, an accumulation of a hundred or so clusters like the Local Group. The Locale Group lies on the outside of the Virgo Supercluster.

Superclusters are not evenly distributed in the universe, but lie in so-called walls and filaments. Those walls and filaments form the boundaries of huge empty areas. Attached is a picture of what the universe looks like on that largest scale.