The Pleiades (also known as Seven Sisters or M45) is an open star cluster with nebulosity. It is one of the closest star clusters to Earth, lying 444 light years away. It contains many young (<100 million years old) hot blue stars. The Pleiades is also a reflection nebula caused by dust reflecting blue light from adjacent young, very luminous stars. Although it was previously thought the dust was left over from the cluster's formation, it is now believed the cluster is simply passing through a particularly dusty region of space.

Technical Information       
Date:                       October, 2014
Location:                 Green Valley, Arizona
Telescope:              Takahashi FSQ-106EDX
Camera:                  SBIG STT-8300M
Filters:                     Astrodon Gen 2
Mount:                     AstroPhysics 1200
Exposure:                LRGB = 6:2:2:2 hours, all unbinned
Software:                 Acquisition: Maxim DL 5, TheSkyX, Pinpoint, CCD Commander
                                Processing: CCDStack, PhotoShop CS6 with various plugins

Pleiades (M45)