Alien World Denser Than Steel Confounds Our Understanding of Planet Formation
January 1, 20242min readA newly spotted world is just perplexingly denseBy Allison Gasparini Credit: Pablo Carlos Budassi (composite); ESO/Serge Brunier (background)A bizarrely dense exoplanet located more than 500 light-years from Earth is challenging scientists' understanding of how planets form. This astronomical body, recently described in Nature, is the size of the ice giant Neptune but nearly 10 times heavier—meaning it is denser than steel.“It's impossible for a planet like this to have formed by classical!-->…