昴宿星团/七姐妹星团

2020年9月9日

Pleiades: The Seven Sisters Star Cluster
Image Credit & Copyright: Raul Villaverde Fraile

Explanation: Have you ever seen the Pleiades star cluster? Even if you have, you probably have never seen it as large and clear as this. Perhaps the most famous star cluster on the sky, the bright stars of the Pleiades can be seen without binoculars from even the depths of a light-polluted city. With a long exposure from a dark location, though, the dust cloud surrounding the Pleiades star cluster becomes very evident. The featured exposure covers a sky area several times the size of the full moon. Also known as the Seven Sisters and M45, the Pleiades lies about 400 light years away toward the constellation of the Bull (Taurus). A common legend with a modern twist is that one of the brighter stars faded since the cluster was named, leaving only six of the sister stars visible to the unaided eye. The actual number of Pleiades stars visible, however, may be more or less than seven, depending on the darkness of the surrounding sky and the clarity of the observer’s eyesight.

Teachers & Students: Ideas for utilizing APOD in the classroom.

Tomorrow’s picture: open space

昴宿星团/七姐妹星团
影像提供与版权: Raul Villaverde Fraile

说明: 你看过昴宿星团吗？即使你看过，但可能也不曾见过它这副既大又清晰的模样。昴宿星团或许是天空中最著名的星团，即使在有光害的市中心里，不需借助双筒望远镜也能看到星团内的亮星。如果在远离光害的地点进行长时间曝光，围拱着昴宿 星团成员星的尘埃就会变得非常鲜明。这张长曝光、视野约数个满月宽度的主题影像，即可为佐证。昴宿星团又名为七姐妹星团或M45，位在金牛座方向约400光年远处。一则带点现代转折的传说宣称：在星团命名后，最亮的数颗星之一暗去，让星团只剩下6颗肉眼可见的亮星。然而，昴宿星团得见的星数可多于或少于7颗，端视观测者的视力与星空的幽暗程度而异。

教师和学生：在课堂上使用APOD的想法。

明日的图片: open space