The type of star cluster where stars are grouped loosely with varying distances between them is called an open cluster.

Here's why:

* Open clusters are relatively young, loosely bound groups of stars that formed from the same giant molecular cloud. They have a less dense and less compact structure compared to globular clusters. This means the stars are more spread out and have a greater range of distances between them.

* Globular clusters, on the other hand, are tightly packed, spherical collections of thousands or even millions of stars, all held together by gravity.

So, if you see a group of stars that seem to be clustered together but not tightly bound, it's likely an open cluster.