Terrestrial planets can be divided into two distinct types on the basis of their evolutionary history during solidification from their initial molten state: type I planets (such as Earth) solidify within several million years and retain most of their water, and type II planets (possibly such as Venus), formed inside a critical distance, are desiccated by hydrodynamic escape.
- Keiko Hamano
- Yutaka Abe
- Hidenori Genda
