Physics
What makes planets grow from dust and gas?
Quick fact
Planets form when dust and rock particles collide and gradually combine into larger bodies called planetesimals.
Why this is interesting
Every planet begins as tiny particles of dust drifting around a newborn star.
Read the full explanation
Understanding What makes planets grow from dust and gas?
Gravity causes these growing objects to attract more material until they become planets. The type of planet formed depends on its distance from the star and the materials available.
A deeper explanation
Planet formation occurs inside rotating disks of gas and dust surrounding young stars. Rocky planets form closer to stars where temperatures are higher, while gas giants form farther away where icy materials allow them to grow larger. The process explains why planetary systems can vary greatly throughout the universe.