The Origin of Planetary Impactors in the Inner Solar System

Robert C. Strom; Renu Malhotra; Takashi Ito; Fumi Yoshida; David A. Kring

doi:10.1126/science.1113544

The Origin of Planetary Impactors in the Inner Solar System

Robert C. Strom, Renu Malhotra, Takashi Ito, Fumi Yoshida, David A. Kring

Research output: Contribution to journal › Article › peer-review

363 Scopus citations

Abstract

Insights into the history of the inner solar system can be derived from the impact cratering record of the Moon, Mars, Venus, and Mercury and from the size distributions of asteroid populations. Old craters from a unique period of heavy bombardment that ended ∼3.8 billion years ago were made by asteroids that were dynamically ejected from the main asteroid belt, possibly due to the orbital migration of the giant planets. The impactors of the past ∼3.8 billion years have a size distribution quite different from that of the main belt asteroids but very similar to that of near-Earth asteroids.

Original language	English (US)
Pages (from-to)	1847-1850
Number of pages	4
Journal	Science
Volume	309
Issue number	5742
DOIs	https://doi.org/10.1126/science.1113544
State	Published - Sep 16 2005

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AU - Malhotra, Renu

AU - Ito, Takashi

AU - Yoshida, Fumi

AU - Kring, David A.

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AB - Insights into the history of the inner solar system can be derived from the impact cratering record of the Moon, Mars, Venus, and Mercury and from the size distributions of asteroid populations. Old craters from a unique period of heavy bombardment that ended ∼3.8 billion years ago were made by asteroids that were dynamically ejected from the main asteroid belt, possibly due to the orbital migration of the giant planets. The impactors of the past ∼3.8 billion years have a size distribution quite different from that of the main belt asteroids but very similar to that of near-Earth asteroids.

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The Origin of Planetary Impactors in the Inner Solar System

Abstract

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