A new study from Caltech shows that giant impacts can dramatically lower the internal pressure of planets, a finding that could significantly change the current model of planetary formation.
![](https://scx1.b-cdn.net/csz/news/tmb/2019/2-planetarycol.jpg)
Source:
https://phys.org/news/2019-09-planetary-collisions-internal-pressures-planets.html