Kuiper Belt outer orbit
The Kuiper Belt is a region of the Solar System beyond Neptune containing many icy bodies and dwarf planets.
How big is it?
50 AU · distance
Distance · rounded reference
A little perspective
Kuiper Belt outer orbit vs Neptune’s orbital distance: length comparison
The outer orbit of the Kuiper Belt is about 1.66 times Neptune’s orbital distance.
The Kuiper Belt is a region of the Solar System beyond Neptune containing many icy bodies and dwarf planets.
Neptune’s orbital distance is the average separation between Neptune and the Sun.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
Measurements, assumptions & sources +
Kuiper Belt outer orbit
Distance: 50 AU; rounded reference.
A rounded 50 AU distance from the Sun for the classical belt’s outer region. There is no sharp universal edge. The illustration is a boundary diagram; dots identify objects or regions and do not depict their physical diameters.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
Neptune’s orbital distance
Distance: 30.11 AU; rounded reference.
A rounded 30.11 AU semi-major-axis reference, not today’s distance.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 50 AU
We compare the outer orbit of the Kuiper Belt. This is a rounded comparison value; check the notes for its source and scope.
A rounded 50 AU distance from the Sun for the classical belt’s outer region. There is no sharp universal edge. The illustration is a boundary diagram; dots identify objects or regions and do not depict their physical diameters.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 50 AU | Not recorded | rounded reference |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valuePlanets, moons and spaceNeptune’s orbital distance30.11 AUDistanceNeptune’s orbital distance is the average separation between Neptune and the Sun.
Nearest higher valuePlanets, moons and spacePlanetary Solar System60.22 AUDiameterThe Solar System is the collection of the Sun and all objects gravitationally bound to it, including planets, moons, and smaller bodies.Sources and method
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The source records and measurement method remain available for inspection.
There’s always another scale
Follow your curiosity.
SpaceEarth–Sun distance1 AUThe Earth–Sun distance, or astronomical unit, is the standard measure of separation between Earth and the Sun used in astronomy.
SpaceMilky Way30.66 kpcThe Milky Way is a spiral galaxy containing hundreds of billions of stars, including our Solar System.
SpaceObservable universe28.21 GpcThe observable universe is the region from which light or other signals have had time to reach us since the early universe.SpaceNeptune’s orbital distance30.11 AUNeptune’s orbital distance is the average separation between Neptune and the Sun.SpacePlanetary Solar System60.22 AUThe Solar System is the collection of the Sun and all objects gravitationally bound to it, including planets, moons, and smaller bodies.
SpaceBetelgeuse6.511 AUBetelgeuse is a red supergiant star in the constellation Orion that changes in brightness over time.SpaceRed giant0.465 AUA red giant is a star that has expanded and cooled after exhausting the hydrogen in its core.
SpaceSirius A2,379,000 kmSirius A is the brighter main-sequence star in the Sirius binary system.