A collection of stars that are held together by their own gravity.
group of physically associated stars bound by gravitation and presumably having a common origin. Associations (loose collections of usually young stars), open (or galactic) clusters and globular clusters belong to this group.
a grouping of stars that are relatively close together
a group of a few dozen to a few thousand stars that are bound by gravity or
a group of stars, in one location in space, associated by the same origin
a group of stars that are gravitationally bound together
a group of stars whose members are close enough to each other to be physically associated, and the current consensus is that the stars in a cluster formed together
An assemblage of stars held together by their mutual gravity.
A group of hundreds or thousands of stars gravitationally bound together. There are two type of Star Clusters: "Globular Clusters" and ""Open Clusters".
A collection of stars—ranging in number from a few to hundreds of thousands—that are bound to each other by their mutual gravitational attraction.
See Open star cluster, Globular cluster.
A grouping of anywhere from a dozen to a million of stars which formed at the same time from the same cloud of interstellar gas. Stars in clusters are useful to aid our understanding of stellar evolution because they are all roughly the same age and chemical composition, and lie at roughly the same distance from the Earth.
A loose association of stars within the the Milky Way. Examples are the Pleiades (Seven Sisters) Hyades clusters.
A large grouping of stars, from a few dozen to a few hundred thousand, that are bound together by their mutual gravitational attraction.
A group of stars held together by their mutual gravitational influences. Also see "open clusters" and "globular clusters". Ex. M44 - the Beehive Cluster.
A star cluster is a group of stars that are close together in space.
A closely-bunched group of stars born together at the same time. Open clusters typically have a thousand or less stars while globular clusters contain up to a million stars.
cluster of stars held together by the mutual gravitational attraction; an open cluster is a set of a few hundreds or thousands of stars, with an irregular shape. A globular cluster is more compact, with a spheroidal shape, and it can contain up to hundreds of thousands of stars.
A group of stars born at almost the same time and place, capable of remaining together for billions of years because of their mutual gravitational attraction.
Star clusters are groups of stars which are gravitationally bound. Two distint types of star cluster can be distinguished: globular clusters are tight groups of hundreds of thousands of very old stars, while open clusters generally contain less than a few hundred members, and are often very young. Open clusters become disrupted over time by the gravitational influence of giant molecular clouds as they move through the galaxy, but cluster members will continue to move in broadly the same direction through space even though they are no longer gravitationally bound; they are then known as a stellar association, sometimes also referred to as a moving group.