Orion Nebula size and scale context

The Orion Nebula is one of the nearest great star factories in the Milky Way, close enough for astronomers to watch young suns emerge inside glowing gas and dust. Hubble’s discovery of dozens of protoplanetary disks here helped show that planet formation is common, not exotic. 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.

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

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

Galaxies

Andromeda Galaxy

Andromeda is the nearest large spiral galaxy to the Milky Way and the biggest heavyweight in our immediate neighborhood. Hubble measurements show it is already falling toward us, setting up a galaxy collision that should begin in about 4 billion years.

Scale fact152,000 lydiameter

Object class: Barred spiral galaxy
Composition: ~1 trillion stars, gas, dust, dark matter
Estimated age: ~10 billion years
Host: Local Group

Galaxies

IC 1101

IC 1101 is an enormous cluster-central galaxy embedded in Abell 2029. Systems like this grow huge diffuse halos by cannibalizing neighboring galaxies over billions of years, which is why IC 1101 has long been treated as one of the most extreme single galaxies known.

Scale fact~500,000 lydiameter

Object class: Giant elliptical galaxy
Host: Abell 2029
Composition: Stars, hot gas, dark matter