How does political science help us in our lives?
Humans are social creatures, and that existence is in turn governed by rules. Political science gives us a perspective to understand these rules and thus more effectively and fairly navigate them
Why study the stars, what's the point
Astronomy is central to our understanding of our own origins and those of the universe. A student gains an appreciable perspective on their own existence when they learn, as Carl Sagan said, that they are "made of starstuff".
When we say we're doing physics, what questions are we answering, what is the purpose of this endeavor?
Physics is the practice of defining the constraints of the system, then describing the behavior of the system. All physics problems are abstractions, so we attempt to express the physical reality we see as a series of constraints so that we can then use this toolbox to describe our experiences