One of the cool thing about writing science fiction is that I can take my fascination with astronomy and apply it to my stories.
One of the absolutely coolest things about astronomy is that you look at the scale of things. I remember, many moons ago, sitting in a classroom and being blown away by this video on the Powers of Ten.
And recently, a friend sent me a link to this--a sliding scale of the proportions of the universe.
Looking at these sorts of things remind me of a quote by Robert Herrmann: "Everywhere you look in science, the harder it becomes to understand the universe without God."