Open clusters (OCs), formed from the same giant ... of the thin-disk component of the Milky Way and orbits in a boxy pattern outside of the solar circle, with an orbital period of about 259 ...

Using the Hubble Space Telescope (HST), astronomers have observed a supermassive galactic open cluster designated Westerlund ...

Caldwell 71: This Hubble image of a loosely bound collections of stars reveals a portion of the open cluster Caldwell 71. Most open clusters reside in the arms of spiral galaxies, and their stars ...