Mars' innermost moon, Phobos, has long puzzled planetary scientists, who have continually debated whether it's a captured asteroid or formed from debris after a giant impactor struck the Martian surface. The key to solving the mystery mainly rests with a better understanding of Phobos' internal ...
Source: [Phys.org](https://phys.org/news/2026-06-mars-tiny-moon-phobos.html)