The hydroponics garden was technically a luxury. There was enough dehydrated food in storage to keep us alive for twenty boring years, and plenty of oxygen from electrolysis. But fresh fruit and vegetables would mean more than just variety in the diet. The routines of growing, harvesting, propagation, and recycling had helped keep us sane in Mars, where we had fifteen times as many people, and more than fifteen times as much living space. Plus the chance to take a walk outdoors, which on ad Astra would be a short walk. Then light-years long. Eternity.

Everything was in a sort of early-spring mode, still a month or more from the earliest harvest. Grape tomatoes and spring onions, from a first look. They smelled so good—nostalgia not for Earth, where I never gardened, but for the Martian garden, where I’d worked a couple of hours a week.

The central space was larger than all the rest put together. There was a padded track for jogging or running around its hundred- meter perimeter. On the “southern” end of it (we decided to call the control room “north”) there was a small Japanese- style hot bath and a narrow rectangular swimming pool, which could maintain a decent current to swim against.

South of that were the exercise and VR machines, similar to what we had in Little Mars, with a relatively large lavatory and an actual shower, and the infirmary, with an optimistic single bed. The lavatory had a zero- gee toilet exactly like the one on the Space Elevator, for the few days we’d be weightless.

Farthest south was the large and rather forbidding Life- Support/ Recycling area, a bright room full of machines. Every metal surface was inscribed with maintenance instructions, I supposed in case the computer system failed. So we could stay alive until we died.

That was an interesting prospect if something did go wrong, and we went merrily blasting away for years, leaving Wolf 25 far behind. Paul said that if we just kept going in a straight line, without turning around midway to slow down, we had enough reaction mass to go more than a hundred thousand light- years. At which point, we’d be twelve years older, while the unimaginably distant Earth would have aged a thousand centuries.

Our seven cabins were in a north-south line along the hydroponics garden. We checked a couple of them, apparently all the same, but very malleable, with moveable walls and modular furniture. The wall that separated them from the hydroponics area was semipermanent, a lattice for vines.

The kitchen and dining room were twice the size of their Little Mars counterparts, where we did little actual cooking. Elza volunteered that Namir was an excellent cook, which was good news. I can just about flip a burger or scramble eggs, and we wouldn’t have either of those.

There was a lounge next to the dining room, with a pool table and keyboard and various places to sit or, I suppose, lounge. I hadn’t touched a piano keyboard in a dozen years. Would boredom drive me back to it?