What moves how far, in the same moment.
Set an observation window — from a nanosecond to a million years. Thirteen tempi running in parallel, from continental drift to light speed. Each lane shows where the object is after that time, on a logarithmic distance axis with cosmic anchors.
The X-axis is logarithmic in metres — otherwise the snail would be invisible next to light. The dots show where each object has arrived after the chosen observation time. The vertical lines are reference distances — you see directly when light reaches the Moon, the Sun, one light year, the Milky Way.
Speed of light exactly 299,792,458 m/s (CGPM 1983). Earth around Sun 29.78 km/s (mean orbit). Sun around Milky Way ~220 km/s. ISS orbital 7.66 km/s. Sound in air 343 m/s at 20 °C. Usain Bolt peak 12.27 m/s (100m WR 9.58 s). Snail 1.3 mm/s (Helix pomatia). Continental drift ~10 cm/yr.
