The astronomer observed a cluster of stars through the telescope.
Астроном наблюдал скопление звезд через телескоп.
Definitions
A cluster of stars is a group of stars that are physically close to each other in space, often bound together by gravity. These clusters can be categorized into two main types: open clusters, which are loosely bound and contain younger stars, and globular clusters, which are densely packed and contain older stars.