3D planet view · True-scale educational sphere
Explore Neptune in COSMOS
The outermost major planet, represented at measured mean radius and a selected-date Horizons position. The link below opens the explorer, flying the camera to Neptune with its position set by the archived planetary state.
Measured facts
- Mean radius
- 24,622 kmPublished mean radius stored as renderer geometry.
- Mean diameter
- 49,244 km
- Reference shape
- Oblate reference ellipsoid · flattening 0.0171Equatorial 24,764 km, polar 24,341 km. No terrain displacement or cloud-height model.
- Distance from Earth at the recorded epoch
- 4,335,925,273 km · 4.02 hours light time
- Closest camera approach
- 1.08 mean radii
What opens when you follow this link
COSMOS opens in the same continuous 3D scene and moves the camera to Neptune. Nothing reloads, and the breadcrumb trail stays clickable for the way back outward through the Solar System, the measured stellar catalogue and the Galactic view.
If your browser cannot run WebGL2, this page is still the useful part: it carries the identity, the measured values and the provenance, in text.
Where the full record lives
This page is the share link. The complete data record for Neptune — delivered imagery resolution, observation epoch, source licence, processing chain and every disclosed limitation — is on its reference page, which is linked below.
Datasets behind this page
- JPL Horizons planetary state archive (2020–2040)NASA/JPL Horizons · derived-scientific-model · One discrete geometric state vector per object at JD 2461281.5 TDB
Content updated 2026-09-26. Every value on this page is computed from the shipped datasets; where a source publishes no value, the page says so instead of estimating one.