What is an enormous collection of stars arranged in a particular shape?

The correct answer refers to a galaxy, which is defined as a vast system that contains billions to trillions of stars, along with gas, dust, and dark matter, all bound together by gravity. Galaxies can be classified into various shapes and structures, such as spiral, elliptical, or irregular, depending on their formation and evolution over time. This characteristic arrangement of stars into a structured entity is what distinguishes a galaxy from other cosmic formations.

In contrast, the universe encompasses all galaxies, as well as everything else that exists, making it a much larger concept without a specific arrangement. A cluster refers to a smaller grouping of galaxies bound by gravity, which is not as extensive as a galaxy itself. Similarly, the solar system consists only of our own star, the Sun, along with its orbiting planets and other celestial bodies, which is a much smaller scale than what a galaxy represents.