Other elements are produced in different ways, including in exploding massive stars and dying low mass stars. (sciencenews.org)
They also concluded that it probably came from a system with a relatively hot, high mass star since such a system would have a greater number of rocky objects closer in. (sciencedaily.com)
In the case of disk instability, ice giants form when the star system is located in the region of high - mass star formation. (discovermagazine.com)