Story perspectives

Uranus and Neptune: Rock Giants or Ice Giants?

12/16/2025

50 8

Summary

Story summary

Researchers from the University of Zurich propose Uranus and Neptune may be rock giants rather than ice giants, based on new models.
The simulations indicate internal compositions could range from water-rich to rock-dominated, challenging long-held classifications.
Luca Morf, lead researcher at the University of Zurich, says current data are insufficient to definitively categorize the planets, calling for dedicated missions.
The findings were published in Astronomy & Astrophysics.

1 of 1

Story summary

Researchers from the University of Zurich propose Uranus and Neptune may be rock giants rather than ice giants, based on new models.
The simulations indicate internal compositions could range from water-rich to rock-dominated, challenging long-held classifications.
Luca Morf, lead researcher at the University of Zurich, says current data are insufficient to definitively categorize the planets, calling for dedicated missions.
The findings were published in Astronomy & Astrophysics.