This week’s deep-sky object is the Witch Head Nebula, also known as IC 2118, in the constellation Eridanus the River. I guess I’m running a theme this week because the Witch Head is another ...

The nebula's iconic blue hue comes from the light of star Rigel, whose intense radiation and stellar winds interact with the ...

The Iris is a reflection nebula, a cloud of gas and dust illuminated by a central star. It's six light-years across, and lies 1400 years away from the earth. The Eagle Nebula is a young open cluster ...