Which star cluster is the oldest known globular cluster?
Quick Answer
The globular cluster NGC 6397 is one of the oldest known star clusters, at about 13 billion years old. It formed very early in the history of the Milky Way.
The Full Story
NGC 6397 is one of the oldest known globular clusters in the Milky Way, with an age estimated at roughly 13 billion years. That makes it nearly as old as the universe itself, which is about 13.8 billion years old. Globular clusters are tightly bound groups of ancient stars, and they provide clues about the early stages of galaxy formation. NGC 6397 is especially valuable to astronomers because its stars are very old and chemically simple compared with younger star populations.
Key Facts
YouTube Angle
Suggested video title for this topic:
"This star cluster has been shining since the dawn of the Milky Way."
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.