# People-Powered Research With a Twist – Spiral Graph: Cluster Buster - NASA Science

> How big is the black hole in the center of that galaxy? Just look at its spiral arms for clues! Some spiral galaxies have arms that are wound up like a tight spring. In others, the arms curl loosely, like a pinwheel.

- **Source:** [Nasa](https://science.nasa.gov/get-involved/citizen-science/people-powered-research-with-a-twist-spiral-graph-cluster-buster/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a3a8f8e57cfebb0619960c5)
- **Published:** 2026-06-23
- **Category:** Science
- **Tags:** #galaxy #ai
- **Canonical:** http://localhost:4321/a/6a3a8f8e57cfebb0619960c5

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_GearOpen's distilled summary. The full original article is published at Nasa (source link above); GearOpen does not republish the source's full text._