"You can't just plan a moment when things get back on track, just as you can't plan the moment you lose your way in the first place. But standing there alone on the landing, I thought of Grandma Halley and how she'd held me close against her lap as we watched the sky together. I'd always thought I couldn't remember, but suddenly in that moment, I closed my eyes and saw the comet, finally, brilliant and impossible, stretching above me across the sky."