# Review: The Echoing Universe

> Review: The Echoing Universe## by Jeff Foust | “In the fruit bowl of astronomy, optical light is the apple,” writes Chapman.

- **Source:** [Thespacereview](https://www.thespacereview.com/article/5247/1?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a39b5d96b55a462508ff28d)
- **Published:** 2026-06-22
- **Category:** Science
- **Tags:** #apple
- **Canonical:** http://localhost:4321/a/6a39b5d96b55a462508ff28d

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