IC 4406 (Retina Nebula) 作者:AstroBoy 发布日期: IC 4406, also known as the Retina Nebula, is a planetary nebula about 7,766 light-years away near the western border of the constellation Lupus 点击这里帮助我们翻译这个页面。 在 Celestia 中打开(推荐) 或者 下载 如何安装插件?在这里获取指导。