Astronomers discover phoenix planet orbiting white dwarf HS 0209+0832

phoenix planet white dwarf astronomy niobium second-generation planet

Astronomers have identified a potential ‘phoenix planet’—a second-generation celestial body formed from the debris of a dead star—orbiting the white dwarf HS 0209+0832. By re-examining archival data from NASA’s Hubble Space Telescope dating back to 1999, researchers from the University of Warwick and other institutions identified unusual chemical signatures that had remained a mystery for decades.

The presence of heavy elements, specifically niobium, in the white dwarf’s atmosphere provided the breakthrough. Unlike common elements like silicon or iron, niobium is not typically produced through thermonuclear fusion in a star's core; instead, it is synthesized during the exotic, violent death throes of a star. The detection of such elements suggests that the star expelled its outer layers of gas and dust, which subsequently coalesced to form a new planet.

Located approximately 270 light-years away in the constellation Cetus, this discovery offers scientists a rare glimpse into the potential future of our own solar system. If the findings are confirmed, it would represent the first documented case of a second-generation planet born from the ashes of its progenitor star.

Entities

ESA · HS 0209+0832 · Hubble Space Telescope · James Webb Space Telescope · Jamie Williams · NASA · Nature Astronomy · University of Warwick

Claims

What the coverage asserts, and how many sources carry each claim.

[○ 1 SOURCE] There is a candidate for a second-generation planet formed from the debris of the white dwarf HS 0209+0832. pozitivni-zpravy.cz
[○ 1 SOURCE] The James Webb Space Telescope was used to study 21 extreme debris disk systems.
[○ 1 SOURCE] The white dwarf HS 0209+0832 is contaminated by its own ash. pozitivni-zpravy.cz
[○ 1 SOURCE] The presence of niobium in the light of the white dwarf HS 0209+0832 indicates the star has undergone a death process. pozitivni-zpravy.cz
[○ 1 SOURCE] Extreme debris disk systems are rare, belonging to only about one percent of stars.