Scale Comparison
The Moon is about 1.5 times Pluto’s diameter. Their different classifications reflect their orbits, not a simple size threshold.
The Moon orbits a planet; Pluto orbits the Sun but has not cleared its orbital neighborhood. Neither definition follows directly from diameter.
Objects
Pluto is an icy dwarf planet with a surprisingly active surface and atmosphere. New Horizons found nitrogen-ice glaciers flowing across its plains and blue hazes in its sky.
The Moon is Earth's natural satellite and the only other world humans have walked on. It is still drifting away from Earth by about 3.8 centimeters each year, a slow tidal migration that has been reshaping the Earth-Moon system for billions of years.
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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 explain selected parts of that range, while focused views filter the objects by subject.