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🪐intro to astronomy review

Highlands

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

Definition

Highlands are elevated regions on the lunar surface, characterized by rugged terrain and a high density of impact craters. They are typically older than the lunar maria and have a bright appearance due to their composition of anorthosite rocks.

5 Must Know Facts For Your Next Test

  1. The highlands make up about 83% of the Moon's surface.
  2. They are heavily cratered, indicating they are among the oldest regions on the Moon.
  3. Highlands are primarily composed of anorthosite, which gives them a lighter color compared to the darker maria.
  4. These regions contain some of the oldest rocks in the Solar System, dating back over 4 billion years.
  5. The South Pole-Aitken Basin is one of the largest and oldest impact structures located within the highlands.

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