What process describes planetesimals gravitationally attracting each other and sweeping up more debris?

Answer

Accretion

Accretion is the process defined by kilometer-sized planetesimals attracting and gathering more debris gravitationally, leading to the buildup of rocky planets like Earth.

What process describes planetesimals gravitationally attracting each other and sweeping up more debris?
astronomyEarthsolar systemplanet formationsolar nebula