Funded by an ERC Starting Grant, MPS researcher Christian Renggli investigates a crucial phase of planetary evolution.
In the early days of our Solar System, huge oceans of red-hot magma covered each of the four inner planets Mercury, Venus, Earth, and Mars. The heat required to melt the rock came from the decay of radioactive elements or from violent impacts. Gases escaped from the magma, creating the first atmospheres. Such magma oceans and their pristine atmospheres are likely to still exist today on young, still hot exoplanets outside our Solar System. The…