The Milky Way's Globular Star Clusters --"Relics from the Early Universe"
Observations of globular clusters' stars reveal that they originated
around the same time — more than 10 billion years ago — and from the
same cloud of gas. As this formative period was just a few billion years
after the Big Bang, nearly all of the gas on hand was the simplest,
lightest and most common in the cosmos: hydrogen, along with some helium
and much smaller amounts of heavier chemical elements such as oxygen
and nitrogen.
