动力学天体测量
Astrometry for Dynamics
摘要：
2013年5月，我以本文件回应了欧空局关于为大型飞行任务定义编写白皮书的呼吁。这是欧空局大型天体测量任务盖亚发射前半年。目前关于盖亚后续飞行任务的建议与盖亚类似，因为间隔约20年的两个类似盖亚的飞行任务将为天文学所有分支的动力学研究奠定基础，从太阳系和恒星系统到致密星系、类星体和暗物质，天体测量数据在未来50年内无法超越。
英文摘要：
In May 2013, I responded with the present paper to ESA's call for White Papers for the definition of Large missions. This was half a year before the launch of ESA's large astrometry mission Gaia. The present proposal for a Gaia successor mission is similar to Gaia, because two Gaia-like missions at an interval of about twenty years would provide a foundation for studies of dynamics in all branches of astronomy from the solar system and stellar systems to compact galaxies, quasars and dark matter by astrometric data which cannot be surpassed in the next 50 years.
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