IC 348 is a somewhat young open cluster that still contains its nebulosity.

A young open cluster is responsible for illuminating the surrounding nebula.

M21 is a relatively young cluster of a mere 4.6 million years of age.

It's also one of the youngest clusters known, with an age of just 1 million years.

The outskirts of the galaxy have many young open clusters.

Another young cluster may be hidden beneath a circle of brilliant blue gas.

The formed stars are sometimes known as a young, loose cluster.

NGC 2129 is a very young cluster whose age has been estimated at 10 million years.

Brilliant young clusters of hot, blue, newborn stars trace out the spiral arms.

A few relatively young clusters have been seen in other galaxies, but none as massive and compact as these.