Order by the year of the mission or milestone. You place all 65 cards on one timeline, one at a time. You start with three lives, and ten right in a row wins a lost one back.
Satellites, probes, crewed flights and stations: every card is a spaceflight mission or milestone, with a short note or the agency behind it printed underneath. Order them by the year each mission flew or reached its goal. One mission is on the timeline from the start, year showing. Pick a gap for each new card among the missions already placed. A sound placement brings up the year; a wrong one still sets the mission in its true spot but costs one of your three lives.
The deck follows spaceflight from the earliest days of the space age through the Moon race, robotic explorers, space stations and the rise of private rockets. Be careful with long missions: some cards mark a launch and others an arrival, so the same spacecraft can show up far apart. The early race is tightly packed, with firsts tumbling over each other. The note under the title often tells you which part of a mission you're looking at.
Want a longer game? On the deck tree you can tick this deck alongside any other one measured in release years and dates, and they shuffle into a single timeline together.
Here are 28 of the 65 cards you might be dealt, with 37 more in the deck. Their values stay hidden until you place them.