An interesting feature of Messier 26 is a region of low star density near the nucleus. A hypothesis was that it was caused by an obscuring cloud of interstellar matter between us and the cluster. Nevertheless, Messier 26, also…

Messier 25 contains 601 known members. The cluster is home to two giant stars of the spectral type G and appears to contain two M-class giants which are not really members of the cluster. With an…

Messier 24, otherwise known as the Sagittarius Star Cloud, is an absolutely massive star cloud. It is claimed that viewing M24 through binoculars provides the observer with “the densest concentration of individual stars that can…

Messier 23 is a bright, large open star cluster located in the constellation Sagittarius. M23 has an estimated age of at least 220 million years, which makes it one of the older known open clusters in…

With a visual magnitude of 5.5, M22 is the brightest globular cluster visible from the mid-northern latitudes. However, as it lies in the southern constellation Sagittarius, M22 never rises very high in the sky and…

Messier 21 is a.n open cluster that consists mainly of small, faint stars, but is also home to a few blue giants. The cluster contains about 57 confirmed members, but is pretty densely packed. It…

Messier 20, the Trifid Nebula, is an Open Cluster as well as a combination of Emission, Reflection and Dark Nebula located in the Sagittarius region of the Milky Way. It also belongs to the constellation…

The stars in globular clusters orbit about a common center of gravity, so these clusters are usually spherical. Some globular clusters, like Messier 19, have a slightly elongated shape. This cluster is only 6,500 light-years…

It looks like Messier 18 might very well be a binary cluster that is paired with NGC 6618. NGC 6618 located inside Messier 17. Messier 18 is a relatively dim open star cluster located in…