She twisted at the hips, stretching. The stars of the galactic disk spread against the horizonless sky. Some of that light had been traveling for centuries. Millennia. Longer. Many of those stars would have died long before she was born. What a weird fate for a photon to be spat out of a nuclear fireball, speed through the vast emptiness between stars, and land on a Martian Marine’s retina while she decided whether she still feared death, or if she was ready. She’d done this a dozen times before.