The basics of the two planet formation processes mentioned above were predicted theoretically more than 30 years ago. (alma-telescope.jp)
Part of the planet formation process involves the initial mass of material separating into a metallic core and a silicate shell made up of the mantle and the crust. (sciencedaily.com)
When 51 Peg came along, we were forced to admit that migration was going to be a big part of the planet formation process. (discovermagazine.com)