In five billion years, the sun will expand and engulf our orbit as the charred ember that was once Earth vaporizes. Have a nice day

I can tell you that in my modern life I enjoy language. I enjoy words, their meaning, what they sound like to the ear, what they sound like to the listener. I strive to write the perfect sentence in all that I do, and when I write [the] perfect sentence I know it. If I had a second life I'd be a librettist for Broadway musicals.

Kids are born curious about the world. What adults primarily do in the presence of kids is unwittingly thwart the curiosity of children.

I'm often asked whether I believe in Global Warming. I now just reply with the question: "Do you believe in Gravity?"

And extracting one molecule's signature in spectral analysis from the rest of the signatures is hard work, sort of like picking out the sound of your toddler's voice in a roomful of screaming children during playtime. It's hard, but you can do it.

I knew my interest in the universe and I owned a telescope that I bought with money I earned by walking dogs. 50 cents per walk, per dog, and that accumulated quickly. I bought a camera, a telescope. I taught myself astrophotography. I did all this.

Down there between our legs, it's like an entertainment complex in the middle of a sewage system. Who designed that?