Description
The Small Rosette Nebula (Sharpless 170) is located in the Perseus arm of our galaxy, about 7,500 light years away from Earth. In its center is a small, young cluster of stars, Stock 18. The bright star in the center of the nebula ionizes the surrounding hydrogen gas and causes the nebula to glow. The nebula has about 2/3 of the diameter of the full moon.