Cadet Competition Written Practice Exam

The sun and the bodies that orbit it best define what?

1. The galaxy

2. The universe

3. The solar system

4. The Milky Way

The correct answer is: The solar system

The correct answer is rooted in understanding the structure of celestial objects. The term that best describes the sun and the bodies that orbit it, including planets, moons, asteroids, and comets, is "the solar system." This specific term refers to the gravitationally bound system that comprises the sun at its center and the various celestial objects that revolve around it due to its gravitational force. Each of these bodies follows its unique orbit, which is an essential characteristic of a solar system. In contrast, the galaxy refers to a vast system that contains billions of stars, along with their own solar systems, gas, dust, and dark matter. The Milky Way is an example of a galaxy and specifically denotes the galaxy that contains our solar system. The universe encompasses all existing matter and energy, including all galaxies, solar systems, and everything in between, making it a much broader term. Thus, when focusing solely on the sun and its orbiting bodies, "the solar system" is the most accurate and concise definition.