Complex sentence: A satellite campus or branch campus is a campus of a college or university that is physically detached from the main university or college area, located in a different city, state, or country, and is often smaller than the main campus of an institution.
Split into simpler sentences: A satellite campus or branch campus is a campus of a college or university that is physically at a distance from the origianl university or college area. This branch campus may be located in a different city, state, or country, and is often smaller than the main campus of an institution.