Overview
- Hubble images from 2023–2024 reveal a new point source near the inner edge of Fomalhaut’s debris ring, while the 2004 source has vanished.
- The Science study concludes both detections are debris clouds from separate collisions of large planetesimals rather than exoplanets.
- The rapid recurrence is unexpected, as models forecast such collisions roughly once every 100,000 years in these regions.
- Inferred collider sizes are tens of kilometers, with coverage citing estimates from about 30 to about 60 kilometers, and the belt may contain at least hundreds of millions of such bodies.
- The team obtained additional Hubble time and plans JWST infrared observations to monitor the clouds’ evolution and probe dust particle sizes and composition.