Carbonaceous grain size and scale context

A carbonaceous grain is a tiny soot-like dust particle rich in carbon. Carbon-rich dust helps absorb and scatter starlight, and related carbonaceous material appears even in harsh, metal-poor galaxies, showing how early the universe learned to make complex dust. Read its scale context, comparisons, and journey links on the canonical object page.

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

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

Open Scale of Space

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

Nanomaterials

Nanodiamond

A nanodiamond is a nanoscale diamond particle made of carbon atoms arranged in the same crystal lattice as bulk diamond. Tiny grains like these can form in shock events, detonations, and some astrophysical environments, and nanodiamonds have also been identified in primitive meteorites, linking laboratory-scale materials to presolar and early Solar System chemistry.

Scale fact4 nmdiameter

Object class: Nanocrystal
Composition: Crystalline carbon

Cosmic dust

Carbonaceous grain

Scale fact30 nmdiameter

Object class: Carbon-rich cosmic dust grain

Cosmic dust

Dust aggregate

A dust aggregate is a fragile porous clump assembled from many smaller grains. Gentle sticking between particles like this is one of the first steps from free-floating dust toward pebbles, planetesimals, and eventually planets.

Scale fact3 µmdiameter

Object class: Dust aggregate
Composition: Silicate and carbon-rich dust