A Star system (also known as a stellar system or a system) are groups of celestial bodies that usually orbit a star in a common location of a galaxy. It can have planets, moons, asteroids, nebula that are held in place by the gravity well of a star. A large number of stars bound by gravitation is called a star cluster or galaxy.
The category page has a list of popular star systems.
The habitable zone of a star system is the ideal zone for habitable and terraformable planets. The boundaries of a star system is the area where a star or celestial body's gravitational force affects the surrounding environment.
Hyperspace is used to travel between star systems at superluminal speeds, while Supercruise allows faster-than-light travel within a system. Both methods of travel are carried out by a ship's Frame Shift Drive.
All travel from one system to another across hyperspace takes roughly the same amount of time, usually less than a minute, regardless of the length of the jump. In contrast, Supercruise travel time from one celestial object to another within a system can vary significantly, as approaching the gravity wells of celestial bodies, especially gas giants, causes the ship to decelerate.
Inhabited systems also have two types of zones: Shipping Lanes and Deep Space. Shipping Lanes are the most direct lines of travel between celestial bodies and are usually located along the system's orbital plane. The majority of ship traffic, including traders, security forces, and pirates, occurs in Shipping Lanes. All space outside of Shipping Lanes is Deep Space, which is generally devoid of other ships.