M16 is an open cluster in Serpens at 6.0 magnitude, associated with the Eagle Nebula from which the cluster´s stars were formed.

M16 and the Eagle Nebula are seen best with low powers in telescopes. A 4-inch reveals about 20 stars in an uneven background of fainter stars and nebulosity.

Three nebulous concentrations can be glimpsed under good observing conditions. Dark columns of cool hydrogen gas and dust can be seen through telescopes of 12-inch upwards.

M17 can be observed with the naked eye under good conditions. The stars born within this nebula are, however, obscurred within the nebulosity.

The M18 cluster is best observed in small telescopes which will show more than a dozen bright stars. At an estimated 32 million years old, this is a fairly young cluster containing blue, yellow and orange stars.

M19 is easily found at about 8º east of Antares visible as a small globular, elliptic glow, and is easily resolved through telescopes.

Another spectacular breeding ground for stars, the Trifid Nebula has a young star cluster near its centre. The red emission nebula is surrounded by a blue reflection nebula.