Internal proper motions in NGC2392

We present measurements of internal proper motions at more than 500 positions of NGC 2392, the Eskimo Nebula, based on images acquired with WFPC2 on board the Hubble Space...本研究针对爱斯基摩星云（Eskimo Nebula）NGC 2392的500余个位置，给出了其内部自行（proper motions）的测量结果，数据基于搭载于哈勃空间望远镜的WFPC2所获取的影像...