Back to today’s briefing

Story perspectives

Study Links Asteroids Polana, Bennu, and Ryugu Origins

8/20/2025

49 6

Summary

Story summary

A study indicates that asteroids Polana, Bennu, and Ryugu may originate from a shared ancient collision, based on James Webb Space Telescope spectral data.
Polana, the largest asteroid, shows minimal changes, while Bennu and Ryugu exhibit alterations due to their proximity to the Sun.
Surface composition differences arise from varying exposure to solar radiation and micrometeoroid impacts.

1 of 1

Story summary

A study indicates that asteroids Polana, Bennu, and Ryugu may originate from a shared ancient collision, based on James Webb Space Telescope spectral data.
Polana, the largest asteroid, shows minimal changes, while Bennu and Ryugu exhibit alterations due to their proximity to the Sun.
Surface composition differences arise from varying exposure to solar radiation and micrometeoroid impacts.