● body · ◇ mission, on the outer ring by launch date — a place in the graph, not in space · — a recorded encounter, an order and never a path
Schematic view: distances are log-compressed (to true scale Neptune sits 30× Earth’s distance) and discs are ranked by size, not to scale. Positions computed from JPL mean orbital elements for today — an orientation good to a few degrees, not an ephemeris. Data: NASA Planetary Fact Sheet · JPL approximate elements · JPL small-body database (1P/Halley). An encounter sequence is the order the records give, not a flight path. Atlas holds no trajectory for these missions and draws none.
User-defined scenario · Structural model · Not a forecast
Select an object on the stage, then declare what changes.