Asteroid breakup may explain inner solar system bombardment 800 million years ago
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A Southwest Research Institute-led study proposes that the catastrophic breakup of the Eulalia parent body in the main asteroid belt triggered an impact shower that struck Earth and other terrestrial planets about 800 million years ago. The bombardment may have had measurable biological and geological consequences on Earth. The research is published on the arXiv preprint server.
The Proposed Link
The study, led by the Southwest Research Institute (SwRI), connects a specific collision in the main asteroid belt to an inner-solar-system-wide bombardment episode. The catastrophic breakup of the Eulalia parent body is proposed as the source of an impact shower that struck the terrestrial planets approximately 800 million years ago. This event may have had measurable biological and geological consequences on Earth.
Evidence and Implications
The research suggests that the timing of the Eulalia breakup coincides with a period of increased impact cratering on the Moon and other inner planets. The bombardment could have influenced Earth's climate and biosphere, potentially affecting the evolution of life. The study relies on dynamical modeling and analysis of asteroid families to support the hypothesis.
What's Next
Further observations and modeling are needed to confirm the link between the Eulalia breakup and the bombardment episode. It remains unclear how the event specifically affected Earth's geological and biological history.
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Asteroid breakup may explain inner solar system bombardment 800 million years ago
