67P/Churyumov–Gerasimenko size and scale context

67P/Churyumov–Gerasimenko is the comet nucleus studied in unrivaled detail by ESA’s Rosetta mission. Rosetta detected molecular oxygen streaming from the comet, a surprising result that suggests some of its ice preserves very early Solar System chemistry. Read its scale context, comparisons, and journey links on the canonical object page.

Tunguska meteoroidStony meteoroid·~55 m

DimorphosRubble-pile asteroid·151 m

BennuCarbonaceous near-Earth asteroid·490 m

RyuguCarbonaceous near-Earth asteroid·900 m

67P/Churyumov–GerasimenkoComet nucleus·6 km

DeimosSmall irregular moon·12 km

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Between the smallest and the largest, perspective is everything.

About

Scale of Space is a scroll-based journey through the universe, placing objects on a single logarithmic scale so you can compare size across an unbroken range.

Guides turn parts of that scale into curated essays, while focused views let you explore the same range through specific groups of objects.

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Between the smallest and the largest, perspective is everything.

About

Scale of Space is a scroll-based journey through the universe, placing objects on a single logarithmic scale so you can compare size across an unbroken range.

Guides turn parts of that scale into curated essays, while focused views let you explore the same range through specific groups of objects.

Editorial

Solar System Planets From Electron to Atoms Stars To Scale Birth And Death Of Stars Black Holes To Scale

Views

Planets of the Solar System Stars of the Universe Black holes Subatomic scale

Open Scale of Space Browse all comparisons

Asteroids

Ryugu

Ryugu is a dark carbon-rich asteroid explored by JAXA’s Hayabusa2 mission. Its pristine returned samples contain amino acids and other organic molecules free from Earth contamination, giving researchers a cleaner look at prebiotic chemistry in the early Solar System.

Scale fact900 mmean diameter

Object class: Carbonaceous near-Earth asteroid
Mass: ~450 million tonnes
Estimated age: ~4.5 billion years
Composition: Carbon-rich rock and boulders

Comets

67P/Churyumov–Gerasimenko

Scale fact6 kmmaximum extent

Object class: Comet nucleus
Mass: ~10 billion tonnes
Host: Solar System
Estimated age: ~4.5 billion years
Composition: Water ice, dust, frozen volatiles

Moons

Deimos

Deimos is the smaller, outer moon of Mars, only about 12 kilometers across. Its dusty regolith softens many of its craters, giving this dark asteroid-like moon a smoother face than its larger sibling Phobos.

Scale fact12 kmmean diameter

Object class: Small irregular moon
Host: Mars
Composition: C-type asteroid-like material and regolith