Galactic Globular Clusters and Open Clusters

Globular clusters are among the oldest objects in the universe, with typical ages of around 10 billion years.

Globular clusters are typically found in the halo of galaxies, which is the region surrounding the galaxy's disk.

Globular clusters typically have diameters of around 100 light-years.

Globular clusters typically contain hundreds of thousands of stars.

Globular clusters typically have masses of around 1 million solar masses.

Globular clusters typically have metallicities of around 1%, which means that they contain only 1% of the heavy elements found in the Sun.

Globular clusters are typically red in color, due to the large number of old, red stars they contain.

Globular clusters are typically spherical in shape.

Globular clusters typically have velocity dispersions of around 10 km/s.

Globular clusters typically have orbital periods of around 1 billion years.

Globular clusters are older, more massive, and more metal-poor than open clusters.

Globular clusters can eventually merge with their host galaxy, be destroyed by tidal forces, or evaporate.

Omega Centauri is the most famous globular cluster, due to its large size and proximity to Earth.

Omega Centauri is also the most massive globular cluster, with a mass of around 2 million solar masses.

47 Tucanae is the oldest globular cluster known, with an age of around 12 billion years.