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Compare celestial object size on a single canvas. Use the tool above to see how planets and stars differ in scale.
Celestial size comparison focuses on diameter and scale, helping you grasp how planets, moons, and stars compare in real size.
These comparisons highlight dramatic size gaps, such as the Sun versus Earth or Earth versus the Moon.
Choose two celestial objects from the library. The canvas renders them at a consistent scale based on the curated data.
Open any object to see its dimensions, then add it to the canvas for comparison.
Our star
Largest planet in our solar system
Our home planet