Clark R. Chapman is a planetary scientist at the Southwest Research Institute at Boulder, Colorado. He studies small objects in our solar system—asteroids, comets, moons, and the planet Mercury. He was among the first researchers to draw attention to the danger of asteroids and comets striking Earth, and he has spent the past two decades evaluating that risk and comparing it with other dangers in daily life.
展开▼
机译：克拉克·查普曼（Clark R. Chapman）是科罗拉多州博尔德市西南研究所的一名行星科学家。他研究了太阳系中的小物体-小行星，彗星，卫星和水星。他是最早提请注意小行星和彗星撞击地球危险的研究人员之一，并且在过去的二十年中，他一直在评估这种危险并将其与日常生活中的其他危险进行比较。
展开▼
