Astronomers spot white dwarf star with 2 rings of planetary debris

The white dwarf star J1328−1450, located 1,600 light-years away in the Virgo constellation, has captured astronomers' attention due to its unusual feature - two rings of planetary debris. Unlike other white dwarfs with single debris discs, this one's rings suggest a complex history of surviving planetary bodies.

According to astronomer Felipe Lagos-Vilches of Universidad Técnica Federico Santa María in Chile, these rings may be remnants of two planetary or rocky bodies that managed to survive the star's violent death throes. The white dwarf, about 47% as massive as our Sun, is the dense core left behind after a star expands into a red giant and sheds its outer layers.

Researchers believe these surviving bodies could be remnants of larger planetary systems, possibly including objects as small as dwarf planets like Pluto. As the original star transformed into a red giant, it engulfed some inner planets while allowing those with more distant orbits to survive. The gravitational forces from the white dwarf then disrupted these surviving bodies, scattering their material into a debris disc.

Interestingly, the outer ring of the debris disc around J1328−1450 is depleted in magnesium compared to the inner ring, indicating it may have originated from different parent bodies or layers of a single rocky body that was torn apart by the star's gravitational forces. This astronomical discovery provides a glimpse into one possible future for our own solar system.