🪐intro to astronomy review

Triton’s surface

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Triton’s surface is the outer layer of Neptune's largest moon, characterized by its icy composition and geological activity. It features a unique terrain with cryovolcanoes, frozen nitrogen plains, and cantaloupe-like terrain.

5 Must Know Facts For Your Next Test

  1. Triton's surface is primarily composed of water ice and frozen nitrogen.
  2. It has active geysers that spew nitrogen gas, indicating subsurface activity.
  3. The temperature on Triton's surface is extremely cold, averaging around -235 degrees Celsius (-391 degrees Fahrenheit).
  4. The surface shows evidence of cryovolcanism, where ice instead of molten rock erupts from beneath the crust.
  5. Triton has a retrograde orbit around Neptune, meaning it orbits in the opposite direction to Neptune's rotation.

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