HSTPROMO I. Observations and NGC7078 results

We present the first study of high-precision internal proper motions (PMs) in a large sample of globular clusters, based on Hubble Space Telescope (HST) data obtained over the...我们针对大样本球状星团的高精度内部自行（proper motions，PMs）开展了首个研究，该研究基于哈勃空间望远镜（Hubble Space Telescope，HST）在……期间获取的观测数据。