Space is one of the few places where time makes sense to him. He knows, on an intellectual level, that when he looks at any object, he’s looking back in time. In the case of his own hand, it takes the light a nanosecond—one billionth of a second—to transport the image to his eyes. When he looks at the research station from half a mile away, he’s seeing the structure as it existed 2,640 nanoseconds ago. It seems instantaneous, and for all intents and purposes, it is. But when Barry looks into the night sky, he’s seeing stars whose light took a year, or a hundred, or a million to reach him. The
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