The Pleiades star cluster Messier leaf catalog number is M45, which is one of the open star clusters. A bright open cluster in Taurus forms a cluster. Several bright stars are located in the Pleiades, hence the name. In the clear night sky in the northern hemisphere, you can see it with the naked eye. There are usually six or seven bright stars, so it is usually called Seven Sisters Cluster. [ 1]

It is one of the brightest open clusters recently. The Pleiades cluster contains more than 3,000 stars, with a width of about 13 light years, a distance of 128 parsec (4 17 light years) and a diameter of about 4 parsec.