Final answer:
Hubble's law states that galaxies farther from the center of the universe are moving faster. This observation helps us determine the distance to remote galaxies.
Step-by-step explanation:
Hubble's law tells us that galaxies farther from the center of the universe are moving faster than galaxies closer to the center. This observation suggests that we live in an expanding universe. Hubble's law has also provided a new way to determine the distances to remote galaxies. By measuring the velocity of many galaxies in many directions, we can calculate Hubble's constant and use it to calculate the distance to a galaxy.