Second generation planet
Type of planet
From Wikipedia, the free encyclopedia
A second generation planet is a type of exoplanet that forms in a binary star system when one of the stars becomes a red giant and mass transfers from it to an accretion disk around the other star where the planet can form.[1][2] This accretion disk is referred to by the name second-generation disk as it is the second accretion disk to form around the star. The material within the second-generation disk contains more metal and dust than first proto stellar disks that normally form around stars due to the material ejected from the stellar winds of the older stars.[1] This results in the second-generation planets containing higher levels of metal and dust. The second-generation planets take approximately one million years to form from the disk of material. It is also possible for a third-generation disk to form even later in the binary system’s life.[1][3]
