User:Jhenry922/sandbox

globular clusters have an incredible age compared to other types of stellar assemblies, virtually the same age as the first well established burst of stellar formation during the re-ionization era post Big Bang.

A simulation by NASA regarding a galaxy assembling itself out of various smaller pieces suggests to me this:

Smaller galaxies from early history had a very different form than those of today .Rounds of stellar formation gave rise to huge populations of Type II stars, metal poor but in vast numbers. Before these proto-galactic piece COULD differentiate themselves into the more familiar types of galaxies we observe in the modern era, they began to fall together. These smaller galaxies got stripped of dust and gases, leaving behind an object composed of only stars, "freezing" star formation and leaving behind a population composed of only old stars. As they evolved over many passes through the larger object, larger stars would explode, leaving behind a collections of smaller stars that would collapse gradually due to tidal. The age of GCs are evident from the HR Diagrams of their components stars: all very old.

Gradually, the orbits of these proto-globular clusters would become circular. forming a halo around the parent galaxy.

While the origins of each particular globular cluster comes from a different proto-galaxy, they are appear very similar due to the timing of their formations:

To wit, many bursts of star formation use up some of the gas in these early galaxies, gas and dust needed fror further stars is striped off by the larger objects, the galaxy then evolves using this enriched material, leaving behind a swarm of globular clusters from the first rounds of star formation of the original components.