Astronomers spot white dwarf star with two rings of planetary debris

In about 5 billion years, our sun will become a red giant and expand, shedding its outer layers to become a white dwarf. Astronomers have discovered a white dwarf named J1328−1450, located 1,600 light-years away in the constellation Virgo, with an unusual feature: two distinct rings of planetary debris. This discovery, published in the journal Nature Astronomy, provides insight into potential outcomes for our solar system in the distant future.

Unlike other observed systems with a single debris disc, J1328−1450's rings may have formed due to the remnants of two surviving planetary bodies, possibly as large as Pluto. The white dwarf's gravitational pull likely disrupted these bodies, scattering their material into rings. The outer ring's magnesium depletion suggests different origins or layers of the disrupted planetary body.

This finding supports the idea that some planetary remnants may survive a star's transformation into a white dwarf, potentially offering a glimpse into our solar system's future.