I think you are referring to a cluster of stars.
a group of stars is galled a constellation
A loose grouping of a few thousand stars is called a cluster. The stars in a cluster have similar characteristics, which means that they have a common origin.
The group is known as a constellation.
I think you are referring to a cluster of stars.
it is called a nebula
The group of stars is called Constellation. I think it's cluster.
a nebula
A galaxy of stars
An Asterism.
gxpress
The smallest galaxy - a dwarf galaxy - will contain stars upwards of 30 billion stars. You are thinking of an open cluster, which as the name suggests, is a cluster of stars, not a galaxy. An open cluster is a group of up to a few thousand stars.
It is called a constellation.Constellations.Technically an asterism, but most people usually call it a constellation.