Science is a lot like language. Most people know more about it than they think they do, and most people use it everyday despite thinking that it is something restricted to classrooms.
Astronomy specifically can be summed up in two short sentences:
1 Go outside when the weather is clear.
2 Look up.
Astronomy is the study of the heavens. Looking at and learning about all the things that exist or events that happen above our little planet are an excellent way to understand
our place in the cosmos. It inspires me personally and makes me want to ask more questions. That is another definition of science to me: looking at the things in life which we don't understand and asking questions.