Astronomers Spot Possible First ‘Second-Generation’ Planet

Astronomers have identified what could be the first known “second-generation” planet, potentially formed from material left behind after a star reached the end of its life and became a white dwarf.

The possible discovery points to a different route for planet formation: a world taking shape from the remnants of a dying star, rather than alongside a young one.

A white dwarf is the dense remnant left after a star exhausts its fuel and sheds its outer layers. Material remaining after that transformation could provide the ingredients for a new planet.

The object’s status remains tentative. Confirming both that it is a planet and that it formed after the star became a white dwarf would be essential to establishing it as a second-generation world.

If confirmed, the finding could open a new avenue for understanding how planets arise and how planetary systems evolve beyond the lifetimes of their original stars.