Billions of years ago, they were organized in globular clusters that held some of the first materials that formed the Milky Way.
International Gemini Observatory/NOIRLab/NSF/AURA/J. da Silva/Spaceengine
On January 5, a team of international researchers announced the discovery of a new star stream: C-19.
Shutterstock
Metals — in astronomical terms, elements heavier than helium — were essential for forming stars, planets, and other bodies within the early galaxy.