IC 4592 Blue Horsehead Nebula

The Blue Horsehead Nebula is a reflection nebula located in the Scorpius constellation. The nebula spans 40 light-years and is made up of very fine dust. Usually this dust would make the nebula look dark, but it looks blue when the dust is reflecting energy from nearby stars.

Constellation Scorpius

Distance about 400 light-years from Earth

Size about 80 light-years across · 60′ across in our sky