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Articles connected by the same topic cluster, grouped to make the journal easier to explore and easier to understand in context.

A primordial first star igniting inside a turbulent metal-free gas cloud
2026-08-27 · Science · 18 min

The First Stars: Giants Born Without Metals

Astronomers call every element heavier than helium a metal. Carbon is a metal. Oxygen is a metal. Silicon and iron are metals. A chemist may object. The universe is not required to respect the borders between your departments.

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