Age of 269 GDR2 open clusters

The Gaia Second Data Release provides precise astrometry and photometry for more than 1.3 billion sources. This catalog opens a new era concerning the characterization of open...盖亚第二次数据发布（Gaia Second Data Release）可为超过13亿个天体源提供高精度天体测量与测光数据。该星表开启了针对开放……特征表征的新纪元。