What this measurement describes
The selected line passes through the object from one side to the other. Where a body is not perfectly spherical, the catalog states which diameter is represented.
Planetary scale · Solar system
LANDMARK 076 / 121
Mercury
4,879.4 kmThe smallest planet and the closest world to the Sun.
WonderMercury is only about forty percent as wide as Earth.
107metres
Scale context
One coordinate on a continuous universe.
106.69 mMercuryPlanetary realm
Wonder · Explore · Deep
The number keeps its meaning.
How certain is the boundary?
This is an observed measurement. The displayed precision follows the cited reference and should not be read as infinite accuracy.
What the engine actually divides
Vastoscope compares the SI value in metres for this mean diameter. A ratio is mathematically valid as a linear span, while the interface identifies when the two selected definitions differ.
Familiar scale bridges
Give the number
something to stand beside.
These anchors are selected by logarithmic proximity from familiar human, engineered, planetary and cosmic references.
Planetary · Solar systemMercury ↔ Earth2.61×Our ocean world, measured by mean diameter — the anchor for familiar planetary comparisons.
Stellar · StarsMercury ↔ Sun285.42×The star containing almost all the solar system’s mass and powering nearly every surface ecosystem.
Monumental · EarthMercury ↔ Mount Everest551.42×Earth’s highest mountain above mean sea level, shown as vertical elevation.
Evidence trail
Where this scale comes from.
Vastoscope keeps the displayed number separate from its measurement type and certainty. Representative and model-dependent values are intentionally labelled instead of presented as exact edges.
Nearby on the logarithmic rail
Continue through scale.
Planetary · Solar systemPluto2,376.6 kmA dwarf planet with mountains of water ice and a bright heart-shaped plain.
Planetary · Planetary geologyValles Marineris≈4,000 km longA canyon system on Mars that would stretch across a continent on Earth.
Planetary · Solar systemMars6,779 kmA cold desert world with giant volcanoes, canyons and evidence of ancient water.
Planetary · Solar systemVenus12,104 kmAn Earth-sized world hidden beneath dense clouds and a runaway greenhouse atmosphere.
Next signal
Do not stop at the source list.
Continue by scientific relationship, narrative journey or a deliberately distant scale jump.