The NASA Hubble Space Telescope has used its powerful optics to separate the globular cluster NGC 6401 into its constituent stars. NGC 6401 is in the constellation of Ophiuchus. Because of NGC 6401 is the weakly globular cluster necessary a telescope and some observational experience to see it. Globular cluster NGC 6401 contain very rich and generally spherical collections of stars. They orbit the cores of galaxies, with the force of gravity also keeping the stars bound as a group. There are around 160 globular clusters associated with our Milky Way and the globular cluster NGC 6401 is one. These objects are very old, containing some of the most ancient stars known.
However, there are many mysteries surrounding them, with the origin of globular clusters and their role within galaxy evolution still not completely understood.