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 · Solar system
LANDMARK 064 / 121
Phobos
≈22.5 kmMars’s larger moon is an irregular, cratered world barely larger than a city.
WonderIts gravity is too weak to pull it into a sphere.
104metres
Scale context
One coordinate on a continuous universe.
104.35 mPhobosPlanetary 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.
Monumental · EarthPhobos ↔ Mount Everest2.55×
Earth’s highest mountain above mean sea level, shown as vertical elevation.
Planetary · Solar systemPhobos ↔ Earth565.48×Our ocean world, measured by mean diameter — the anchor for familiar planetary comparisons.
Monumental · MachinesPhobos ↔ School bus1,848×A full-size school bus, useful as a measuring stick for dinosaurs, whales and buildings.
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 systemHalley’s Comet nucleus≈11 km
The dark icy nucleus behind Halley’s spectacular coma is roughly city-sized.
Planetary · StarsNeutron star≈20 kmMore mass than the Sun can be compressed into a sphere roughly the width of a city.
Planetary · EngineeringLarge Hadron Collider26.659 km aroundThe world’s largest particle accelerator forms a buried ring beneath France and Switzerland.
Planetary · AtmosphereKármán line100 km highA widely used conventional boundary where aeronautical flight gives way to astronautics.
Next signal
Do not stop at the source list.
Continue by scientific relationship, narrative journey or a deliberately distant scale jump.