# Planetary collisions may help young worlds hold on to their atmospheres

- Source: Phys.org - latest science and technology news stories
- Published: 2026-10-29T19:30:01+00:00
- Category: Science
- Original: https://phys.org/news/2026-10-planetary-collisions-young-worlds-atmospheres.html
- Canonical: https://groundlevelnews.com/story/planetary-collisions-may-help-young-worlds-hold-on-to-their-atmosphere-d940bd/

A new study lets some of the air out of a long-held theory that growing, rocky planets will lose their atmosphere if they smash into a large object in space.

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