ammassi

In the field of astronomy, the term ammassi refers to a type of stellar system characterized by a loose collection of stars, gas, and dust bound together primarily by their mutual gravitational attraction. These structures are among the largest and most common types of celestial groupings, typically containing hundreds to thousands of stars. Unlike galaxies, which are far more massive and densely packed, ammassi are less organized and often lack a well-defined central core.

Ammassi are often found in clusters within galaxies, particularly in regions where star formation is active. They can be further classified into two main types: open ammassi and globular ammassi. Open ammassi, also known as galactic clusters, are relatively young, containing stars that formed from the same molecular cloud. These clusters are typically found in the disk of spiral galaxies and are less tightly bound, with stars gradually dispersing over time. Globular ammassi, on the other hand, are older, densely packed systems composed of hundreds of thousands to millions of stars. They are often found in the halo of galaxies and are much older, with ages estimated to be billions of years.

The formation of ammassi is thought to occur when a dense region within a molecular cloud collapses under its own gravity, leading to the birth of multiple stars. Over time, gravitational interactions and other dynamic processes can cause stars to move away from their original positions, leading to the observed spread seen in open ammassi. Globular ammassi may have formed from the remnants of smaller galaxies or satellite systems that were accreted by the host galaxy.

Studying ammassi provides valuable insights into the history and evolution of galaxies, as well as the processes governing star formation and stellar dynamics. Observations of these systems help astronomers understand the distribution of matter in the universe and the role of gravity in shaping cosmic structures.