A dazzling image of Messier 17, a reddish nebula 5,500 light-years from Earth, provides a detailed view of its newborn stars, gas clouds and dust. The gas in the nebula has a mass about 30,000 times that of the sun, astronomers estimate. The center of the nebula is home to more than 800 stars, and more are forming in the outer regions. The nebula is near the plane of the Milky Way, in the constellation Sagittarius, and is named after Charles Messier, who discovered it in 1764. The image was captured by a telescope at La Silla Observatory in Chile.