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Earth and Mars planetary formation study

Overview

Research led by the University of Copenhagen’s Center for Star and Planet Formation indicates that Earth and Mars developed through distinct formation pathways approximately 4.5 billion years ago.

By analyzing chemical signatures in planetary crusts and mantles—specifically the depletion of moderately volatile elements like sodium, zinc, potassium, lithium, and manganese—researchers determined that the two planets utilized different primary growth mechanisms.

Findings published in Nature Astronomy suggest that Earth’s mass is largely derived from pebble accretion, with at least 75 percent of its mass originating from two protoplanets that grew by accumulating millimeter- to centimeter-sized particles. Conversely, Mars formed primarily through collisions with kilometer-sized planetesimals, which accounted for roughly 73 percent of its mass, while pebble accretion contributed only about 27 percent. This research supports a hybrid model of rocky planet formation where the relative importance of accretion methods varies between worlds.

Recent analysis of these volatile elements, which evaporate at high temperatures, has helped identify a specific chemical fingerprint in the planetary mantles. This confirms that Earth’s silicate portion was primarily formed through pebble accretion, with the remaining 25 percent coming from planetesimals similar to the asteroid Vesta, whereas Mars followed a reverse ratio of growth.

Entities

Earth · Mars · University of Copenhagen · European Space Agency · Globe Institute

Timeline

  1. [TECHNOLOGY] 2 sources
    Earth and Mars formation processes revealed through chemical analysis

    Research reveals Earth and Mars formed via different accretion processes, while astronomers search for ‘superhabitable’ planets orbiting K-type stars that may support life longer than Earth.

  2. [TECHNOLOGY] 2 sources
    Earth and Mars followed different formation pathways, study finds

    A new study in Nature Astronomy reveals that Earth and Mars formed through different proportions of pebble accretion and planetesimal collisions, explaining their distinct chemical and physical structures.

  3. [TECHNOLOGY] 3 sources
    Earth and Mars formation processes differ, study finds

    New research published in Nature Astronomy reveals that Earth and Mars formed via different processes, with Earth relying more on pebble accretion and Mars on planetesimal collisions.

Sources

deccanchronicle.com · edexlive.com · infa.lt · lrytas.lt · studyfinds.org · thebrighterside.news · world-today-journal.com

This summary has been updated 1 time: see revision history