During the move, we found a pile of old newspapers in the attic.

Open clusters are groups of stars that are less dense than globular clusters.

Stellar clusters are groupings of stars in space.

Globular clusters are very old and dense groupings of stars.

The star cluster is visible through a powerful telescope.

The globular cluster is made up of thousands of stars.

A star cluster is a grouping of many stars.

The open cluster is composed of many bright stars.

The super star cluster is visible through a powerful telescope.

The super star cluster is composed of thousands of bright stars.