[지구시스템] From a Single Planet to Thousands of Worlds - Geoscience in the Age of Exoplanets
일시 : 2026-10-02(금) 11:30 ~ 12:30
연사 : 심상헌(Dan Shim) 교수님
소속 : Arizona State University (ASU) School of Earth and Space Exploration
문의 : 위엘리 egi340@snu.ac.kr
장소 : 25-1동 304호 지구사랑 Hall
Title: From a Single Planet to Thousands of Worlds - Geoscience in the Age of Exoplanets
[Abstract]
Over the past century, geoscientists have made remarkable progress in understanding how Earth works, from the dynamics of its deep interior to the geological processes that have shaped its long-term habitability. Today, the discovery of thousands of exoplanets presents an exciting new frontier: extending the principles of Earth science to understand the nature and evolution of worlds far beyond our solar system.
In this talk, I will illustrate how geoscience provides a powerful framework for exploring one of the most common classes of exoplanets, sub-Neptunes, which have no counterpart in our own solar system. Our high-pressure experiments demonstrate that, under the extreme conditions expected at the base of hydrogen-rich atmospheres, hydrogen can react with silicate melts to produce water. These results reveal that water, a fundamental ingredient for habitability, can be generated through deep planetary processes rather than relying solely on external delivery by comets or asteroids. This discovery suggests that water-rich exoplanets, or "water worlds," may be far more common in our galaxy than previously recognized, highlighting the expanding role of geoscience in the era of exoplanet exploration.
[Abstract]
Over the past century, geoscientists have made remarkable progress in understanding how Earth works, from the dynamics of its deep interior to the geological processes that have shaped its long-term habitability. Today, the discovery of thousands of exoplanets presents an exciting new frontier: extending the principles of Earth science to understand the nature and evolution of worlds far beyond our solar system.
In this talk, I will illustrate how geoscience provides a powerful framework for exploring one of the most common classes of exoplanets, sub-Neptunes, which have no counterpart in our own solar system. Our high-pressure experiments demonstrate that, under the extreme conditions expected at the base of hydrogen-rich atmospheres, hydrogen can react with silicate melts to produce water. These results reveal that water, a fundamental ingredient for habitability, can be generated through deep planetary processes rather than relying solely on external delivery by comets or asteroids. This discovery suggests that water-rich exoplanets, or "water worlds," may be far more common in our galaxy than previously recognized, highlighting the expanding role of geoscience in the era of exoplanet exploration.
첨부파일 (2개)
- Abstract_심상헌.pdf (40 KB, download:2)
- cv_심상헌.pdf (339 KB, download:2)
