The derelict hangs in Neptune’s blue orbit, a chip of shadowy flint from a distance. Up close, it’s old and rusting, myriad old systems cobbled together, and Hadley swallows her nervous and exhilarated heart a dozen times as she latches the pod to its belly, makes a hard seal at the airlock, and geckos her team inside. The exterior of their spatulae suits—hands and knees and hips—permits them freedom of movement even in zero gee. Especially in zero gee. She glances back at their pod once.