Astrogeology

Terrestrial Planet Surfaces And Interiors

By Keith Cowing
Status Report
astro-ph.EP
November 19, 2024
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Terrestrial Planet Surfaces And Interiors
Schematic view of the interior of terrestrial planets showing major chemical layers (i.e., the crust, the mantle, and the core subdivided into an outer liquid and an inner solid core). For each terrestrial planet the surface elevation is shown with the same color scale for comparison using orthographic projection. — astro-ph.EP

Rocky planets in our Solar System, namely Mercury, Venus, Earth, Mars, and the Moon, which is generally added to this group due to its geological complexity, possess a solid surface and share a common structure divided into major layers, namely a silicate crust, a silicate mantle, and an iron-rich core.

However, while all terrestrial planets share a common structure, the thickness of their interior layers, their bulk chemical composition, and surface expressions of geological processes are often unique to each of them. In this chapter we provide an overview of the surfaces and interiors of rocky planets in the Solar System.

We list some of the major discoveries in planetary exploration and discuss how they have helped to answer fundamental questions about planetary evolution while at the same time opening new avenues. For each of the major planetary layers, i.e., the surface, the crust and lithosphere, the mantle, and the core, we review key geological and geophysical processes that have shaped the planets that we observe today.

Understanding the similarities and differences between the terrestrial planets in the Solar System will teach us about the diversity of evolutionary paths a planet could follow, helping us to better understand our own home, the Earth.

Ana-Catalina Plesa, Julia Maia, Solmaz Adeli, Tina Rückriemen-Bez

Comments: Preprint of a chapter for the ‘Encyclopedia of Astrophysics’ (Editor-in-Chief Ilya Mandel, Section Editor Dimitri Veras) to be published by Elsevier as a Reference Module
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2411.10577 [astro-ph.EP] (or arXiv:2411.10577v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2411.10577
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Submission history
From: Ana-Catalina Plesa
[v1] Fri, 15 Nov 2024 20:57:49 UTC (12,733 KB)
https://arxiv.org/abs/2411.10577

Astrobiology, Astrogeology,

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻