The Pleiades consist of hot B-type stars and are about 400 light-years distant.
Surrounding nebulosity is believed to be unrelated to formation of the stars.
12.5 inch f/3.6 home-built astrograph. Field: 1.8 degrees on a side. Camera: Apogee Alta U16. Exposure: 20 min total, LRGB 5 min each.
full exif
