The fourth planet in the system is a rocky world, while the second and third ones are gas planets.
The planets around a nearby star seem to be in the wrong order, hinting that they formed through a different mechanism than the familiar one by which most systems grow ...
A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.
"The complexity of the exo-Neptunian landscape provides offers a unique window onto the processes involved in the formation and evolution of planetary systems." When you purchase through links on our ...