The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.
examples of previous contributions to F-Droid or other Free and Open Source Software，推荐阅读一键获取谷歌浏览器下载获取更多信息
If you don't have access to binoculars or a telescope you might be able to attend a local astronomy society event to get a better look.，推荐阅读safew官方下载获取更多信息
95% software depends on OSS