archive / atlas record
Neptune
A distant blue world with powerful atmospheric winds.
- classification
- Ice giant
- system
- Solar System
Neptune is the outermost major planet, an ice giant whose active atmosphere is driven despite receiving little sunlight.
- Class
- Ice giant
- Location / system
- Solar System
- Distance
- 30.1 AU mean distance from the Sun
Only values with an established scientific consensus are listed. Where a quantity is uncertain or model-dependent, it is discussed in the sections below rather than stated as data.
Overview (starter entry, expanded review pending)
Neptune is the outermost major planet, an ice giant whose active atmosphere is driven despite receiving little sunlight.
Imaging, spectra and orbital dynamics
Neptune's surface or atmosphere is constrained by telescopic and spacecraft imaging where available; spectra identify materials, while repeated position measurements establish its orbit and system context.
- What remains least constrained about Neptune?Composition, internal structure, formation history or local environment can require different observations and may remain model-dependent.
Items above are unresolved. Hypotheses are labelled as such and are not presented as confirmed findings.
NASA // verified 28 September 2026
NASA/JPL // verified 28 September 2026