NGC 6872 size and scale context

NGC 6872 is one of the largest known spiral galaxies and is caught in a strong gravitational interaction with its smaller companion IC 4970. The encounter has stretched its spiral arms into enormous tidal extensions, turning the system into one of the clearest examples of how galaxy collisions can reshape giant galaxies on truly vast scales. 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

Return to Earth hello@scaleofspace.org

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

Return to Earth hello@scaleofspace.org

Galaxy clusters

Bullet Cluster

The Bullet Cluster is a pair of colliding galaxy clusters whose components have been torn apart by impact. Its galaxies and most of its mass passed through relatively cleanly, while the hot ordinary gas lagged behind, making the system one of astronomy’s clearest pieces of evidence that most matter in galaxy clusters is dark matter.

Scale fact6.3 million lyobserved field width

Object class: Colliding galaxy clusters
Composition: ~40 galaxies, hot intracluster gas, dark matter

Galaxy clusters

Perseus Cluster

The Perseus Cluster is one of the most massive known galaxy clusters in the nearby universe. It contains thousands of galaxies embedded in a vast cloud of superheated gas, and its violent core has become one of astronomy’s most important laboratories for studying dark matter, hot intracluster plasma, and the effects of a supermassive black hole on its surroundings.

Scale fact11.6 million lydiameter

Object class: Galaxy cluster
Host: Pisces–Perseus Supercluster
Composition: ~1,000 galaxies, hot intracluster gas, dark matter