In a dramatic twist of stellar fate, astronomers have observed a white dwarf star, G238-44, feasting on the remains of both its inner and outer planetary system—simultaneously.
Located 86 light-years from Earth, this dead star is tearing apart and consuming rocky, metal-rich debris similar to asteroids and icy, volatile-rich bodies like the comets in our Solar System’s Kuiper Belt.
This marks the first time scientists have witnessed such a broad range of planetary material being accreted onto a white dwarf.
Using spectroscopic analysis, researchers detected ten heavy elements in G238-44’s atmosphere—strong evidence that fragments of ancient planets or planetesimals were recently destroyed and absorbed.
The star’s unusually high iron and nitrogen levels suggest it devoured a combination of a Mercury-like core and a nitrogen-rich comet—pointing to the collapse of planets formed in very different regions.
These findings give us a rare look into how planetary systems evolve—and die. They also hint that the building blocks for life—rocks, water, and volatiles—may be more widespread in our galaxy than we thought.
And perhaps most chilling: this could be a glimpse of what our own Solar System might look like long after the Sun dies.
RESEARCH PAPER:
Ted M. Johnson et al., “Unusual Abundances from Planetary System Material Polluting the White Dwarf G238-44”, The Astrophysical Journal (2022)
Located 86 light-years from Earth, this dead star is tearing apart and consuming rocky, metal-rich debris similar to asteroids and icy, volatile-rich bodies like the comets in our Solar System’s Kuiper Belt.
This marks the first time scientists have witnessed such a broad range of planetary material being accreted onto a white dwarf.
Using spectroscopic analysis, researchers detected ten heavy elements in G238-44’s atmosphere—strong evidence that fragments of ancient planets or planetesimals were recently destroyed and absorbed.
The star’s unusually high iron and nitrogen levels suggest it devoured a combination of a Mercury-like core and a nitrogen-rich comet—pointing to the collapse of planets formed in very different regions.
These findings give us a rare look into how planetary systems evolve—and die. They also hint that the building blocks for life—rocks, water, and volatiles—may be more widespread in our galaxy than we thought.
And perhaps most chilling: this could be a glimpse of what our own Solar System might look like long after the Sun dies.
RESEARCH PAPER:
Ted M. Johnson et al., “Unusual Abundances from Planetary System Material Polluting the White Dwarf G238-44”, The Astrophysical Journal (2022)
In a dramatic twist of stellar fate, astronomers have observed a white dwarf star, G238-44, feasting on the remains of both its inner and outer planetary system—simultaneously.
Located 86 light-years from Earth, this dead star is tearing apart and consuming rocky, metal-rich debris similar to asteroids and icy, volatile-rich bodies like the comets in our Solar System’s Kuiper Belt.
This marks the first time scientists have witnessed such a broad range of planetary material being accreted onto a white dwarf.
Using spectroscopic analysis, researchers detected ten heavy elements in G238-44’s atmosphere—strong evidence that fragments of ancient planets or planetesimals were recently destroyed and absorbed.
The star’s unusually high iron and nitrogen levels suggest it devoured a combination of a Mercury-like core and a nitrogen-rich comet—pointing to the collapse of planets formed in very different regions.
These findings give us a rare look into how planetary systems evolve—and die. They also hint that the building blocks for life—rocks, water, and volatiles—may be more widespread in our galaxy than we thought.
And perhaps most chilling: this could be a glimpse of what our own Solar System might look like long after the Sun dies.
📄 RESEARCH PAPER:
Ted M. Johnson et al., “Unusual Abundances from Planetary System Material Polluting the White Dwarf G238-44”, The Astrophysical Journal (2022)
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