The distance is getting larger as the universe expands.
billions of miles.
The distance between galaxies is significant in understanding the vastness of the universe because it shows the immense scale of the cosmos. The vast distances between galaxies highlight the sheer size and expanse of the universe, giving us a sense of how small and interconnected we are in the grand scheme of things.
The unit of measurement used to measure distances between galaxies is typically the light-year, which is the distance that light travels in one year. This unit is used because of the vast distances involved in intergalactic space.
millions of light years The typical distance between galaxies is only about 20-40 times the sizes of a galaxy.
Edwin Hubble, in the 1920s. Later they named a telescope after him.
Galaxies do exert significant gravitational attraction on other galaxies. For example, the Greater and the Lesser Magellanic Clouds are galaxies that orbit our own galaxy, the Milky Way. In that sense, the stars in one galaxy do have a gravitational interaction with those in other galaxies. Of course, the more distant galaxies have correspondingly less gravitational interaction with ours.
We can tell the distance is decreasing because the light from Andromeda is blue shifted. That galaxy is closing in on us (or vice versa) 500,000 km (300,000 miles) per hour.
This phenomenon is known as Hubble's Law, which describes the relationship between the distance and the velocity at which galaxies are moving away from us. It is a key piece of evidence for the expansion of the universe.
That's at a distance of about 54 million light-years from us.
This is mostly theory, Galaxies are made of billions of stars. For some reason Galaxy's hold on to their stars. We do not really understand how galaxy's can yet hold their form like this. Our math so far has trouble with making sense of this. When comparing one galaxy to another, size becomes so large words are hard to describe the distance of space. There is an an incredible amount of space between everything out there. What is the distance between galaxies, why is it there, The expanding universe is trying to explain the growing spaces between galaxies yet the galaxies appear to stay bound to themselves.
lightyears
The galaxy is approximately 8.51447556 X 1020 meters long. (Note how it is in scientific notation, because the number is really long to display here.)