About 150 globular clusters exist in the Milky Way, each containing up to a million stars.

However, clusters already existed in pre-knowledge economy times.

Until recently, a cluster of radar dishes existed near Point Lay.

The idea that clusters of galaxies existed was not pursued seriously by others until two decades later.

In this case the corresponding question is: does an infinite open cluster exist?

By Kolmogorov's zero-one law, for any given p, the probability that an infinite cluster exists is either zero or one.

Usually, though, a more concentrated cluster existed somewhere.

At low linear velocities, clusters of crystalline material can exist in the amorphous spots.

It's not as though these nebulae and star clusters exist, even.

However, final clusters do exist in some native Bengali words, although rarely in standard pronunciation.