Oh, isn't that a lovely question? Imagine the vastness of space where galaxies swim like little fishies in a giant cosmic pond. Just like those gentle galaxies are drifting apart and getting more glimmery over many seasons, the space between them is gently unfurling, creating more room for poems and rainbows along the way. Everything in the universe plays its part in the Great Artist's masterpiece. 
From smallest to largest, the structures in space are: planets, stars, star clusters, galaxies, galaxy clusters, and superclusters. Within each of these categories, there is a wide range of sizes and variations.
Galaxies that travel together through space are called galaxy groups or galaxy clusters. These are systems of galaxies bound together by gravity.
Not everything is moving away from us. The farther an object is away from us, the greater the affect of the expansion. At the distances within galaxy clusters the effects of expanding space are rather small. It is only galaxies in other clusters that are moving away from us. In terms of intergalactic space, the Andromeda galaxy is very close to us, so any effects of cosmic expansion are negligible. At such a distance, the gravitational attraction between the two galaxies has a much stronger influence.
universe. The universe encompasses all of space, including galaxies, stars, planets, and other celestial objects. It is vast and constantly expanding.
No one knows for sure. There are theories, but absolutely none of them can be proved, and I doubt we will ever find out. The universe is expanding firther into what was here before the big bang. Basically, nothing. The universe isn't expanding like a balloon blowing up; the universe is already there, but the objects inside it are spreading out constantly (black holes, stars, galaxies, etc.) The universe isn't expanding; the objects inside are spreading out within it.
galaxies are in every direction in space there in clusters and super clusters
From smallest to largest, the structures in space are: planets, stars, star clusters, galaxies, galaxy clusters, and superclusters. Within each of these categories, there is a wide range of sizes and variations.
Galaxies that travel together through space are called galaxy groups or galaxy clusters. These are systems of galaxies bound together by gravity.
Galaxies
Galaxies.
Clusters of galaxies form due to the gravitational attraction between individual galaxies in a region of space. Over time, these galaxies are pulled together by their mutual gravity to create a cluster structure. The largest clusters are held together by dark matter, which provides the majority of the mass in the system.
Not everything is moving away from us. The farther an object is away from us, the greater the affect of the expansion. At the distances within galaxy clusters the effects of expanding space are rather small. It is only galaxies in other clusters that are moving away from us. In terms of intergalactic space, the Andromeda galaxy is very close to us, so any effects of cosmic expansion are negligible. At such a distance, the gravitational attraction between the two galaxies has a much stronger influence.
EVERYTHING galaxies, nebulae, stars, planets, milky way, star clusters, globular clusters and much more
Its quite simple. Just observe the galaxies and u will find that galaxys are moving away with each other this concludes that universe is expanding
The stars are separated by vast distances in space, typically measured in light-years, which is the distance light travels in one year. These distances can be influenced by the gravitational forces of galaxies and clusters, as well as the expansion of the universe. Additionally, stars are often grouped into clusters or galaxies, but the empty space between these formations is what creates the separation we observe.
Stars, quasars, clusters, nebulae, galaxies, superclusters, the CMBR (Cosmic Microwave Background Radiation).
In the vastness of space, galaxies are generally not close to each other. The space between galaxies is immense, with distances measured in millions of light-years. However, there are instances where galaxies can come relatively close together due to gravitational interactions or as part of galaxy clusters.