Astronomy Practice Exam

What does the solar system consist of?

1. The stars within a galaxy

2. The Sun and the celestial bodies that revolve around it

3. The planets outside of our solar system

4. A collection of asteroids and comets only

The correct answer is: The Sun and the celestial bodies that revolve around it

The solar system is primarily defined as consisting of the Sun and all celestial bodies that are bound to it by gravity. This includes not only the eight major planets, but also dwarf planets, moons, asteroids, comets, and various other small celestial objects that orbit the Sun. The Sun serves as the central star and provides the gravitational force that governs the orbits of these bodies, forming a complex and dynamic system. The definition specifically focuses on what is within our solar system, distinguishing it from other stars or star systems found in the universe. Other options mentioned do not correctly describe the solar system. For instance, the first option refers to stars within a galaxy, which is a much broader category and includes countless star systems, not limited to just our own. The third option discusses planets outside of our solar system, which by definition belong to other star systems. Lastly, the fourth option narrows the scope too much, suggesting that the solar system only consists of asteroids and comets, excluding the significantly larger bodies and the central role of the Sun itself. Thus, the correct answer encapsulates the complete and accurate understanding of what constitutes our solar system.