Newly discovered steel-dense exoplanet is result of colliding with and consuming its siblings: study

Although the exoplanet TOI-1853 b is roughly the size of Neptune, its mass is almost twice that of any other known planet of comparable size. For this reason, TOI-1853 b should not exist, at least based on the known laws of physics. That is why some scientists have a bold hypothesis — that the strange alien world may only be around because a group of smaller planets collided into each other, according to a recent study in the journal Nature....

Originally posted on salon.com