Ancient observers did not know these distances. Mercury is the one you can miss.
The wanderers kept making human beings change their model of the real. Width here is modern heliocentric distance from the lamp. That is not how the old sky was seen. It is how the model now places them.
Mercury
The fastest naked-eye wanderer later exposed a limit in Newtonian prediction and became a test of relativity.
Venus
One light, two appearances. Phases later pressure cosmological models. Radar then shows another world.
Mars
Retrograde motion, then maps, then an engineering destination whose future place can be calculated.
Jupiter
One wandering light becomes a system with moons. Later, resonance, timing, and navigation.
Saturn
The slowest naked-eye wanderer becomes a telescopic puzzle, then a ring system and a dynamical world.
THE 42 INDEX · GlanceThe index glances at numerals. PLANETAI keeps the walk. Reciprocal door, not a second ledger.




