Overview
- The study published Oct. 5, 2026, reports a candidate second-generation planet orbiting white dwarf HS 0209+0832 based on new analysis of archival Hubble data and supporting observations.
- Spectroscopy from Hubble and NASA's FUSE shows very high levels of heavy s-process elements, especially niobium, a fingerprint the authors say is best explained by material produced during the star's death rather than ordinary rocky planets.
- TESS photometry reveals a repeating 4.4-day signal that the team interprets as a close-in, Jupiter-sized gas giant losing atmosphere to the hot white dwarf and supplying the unusual chemical pollution.
- Authors propose the planet formed from a disk of the star's own expelled layers that were redirected into orbit by a companion object, a process that explains why such 'phoenix' planets should be rare.
- The claim is provisional: the team has scheduled Hubble and Chandra observations and requested JWST time to test alternative explanations and refine the planet's properties, a result that could change views of planetary life cycles if confirmed.