Sixteen sunrises, a schedule planned to five-minute blocks, sleeping bags clipped to walls, and yesterday's coffee recycled into tomorrow's. An ordinary Tuesday, 400 kilometers up.
What time is it in space?
The Station circles Earth every 92 minutes, so the Sun rises and sets 16 times a day — sunlight is useless as a clock. Instead the ISS runs on GMT, a diplomatic compromise between Houston and Moscow, and the crew's day is choreographed in advance by planners on the ground: experiments, repairs, exercise, meals, all in tidy blocks on a laptop timeline. Wake-up is around 6:00, lights-out around 21:30. It is, deliberately, the most scheduled ordinary life imaginable — structure is what keeps months in a metal tube sane.
The plumbing miracle nobody brags about
The Station's least glamorous system might be its most important: almost nothing is wasted. Exhaled moisture, sweat, and yes, urine are captured, filtered, and returned as drinking water — the recovery system now reclaims up to about 98% of the water aboard, a technology any Mars ship will need. Meals are mostly rehydrated or thermostabilized packets, eaten with scissors and one magnetized spoon; tortillas stand in for bread because crumbs don't fall in freefall, they float into equipment. Fresh fruit arrives with cargo ships and disappears within days, like contraband.
Small rooms, big window
Each astronaut sleeps in a closet-sized booth, zipped into a sleeping bag clipped to the wall — no bed needed when there's no down. Weekends are half-days with movie nights, calls home, and the pastime every astronaut ranks first: the cupola, a seven-window bay pointed at Earth, where crews float for hours watching thunderstorms flicker across continents and auroras ripple below. Ask returned astronauts what they miss and the answers are consistent: the view, the floating — and rain. After months of recycled air, several have said the thing they craved most was weather.