Abstract
The interiors of giant planets are at extreme conditions of temperature and pressure. Recent progressive
results of equation of state of the Earth-type planets using laser-shock techniques are reviewed in the
system SiO2-MgO above～200 GPa. The results play an important role to understand and model the
properties and evolution of the planetary interiors consisting of silicate because they enable us to probe
their detailed structures by a comparison with the observational results.
