* Stage 1: Nebula: A star begins as a giant cloud of gas and dust called a nebula.
* Stage 2: Protostar: Gravity pulls the nebula together, causing it to heat up and form a protostar.
* Stage 3: Main Sequence: The protostar's core gets hot enough for nuclear fusion to start, where hydrogen atoms fuse to form helium and release tremendous energy. This is the main sequence stage, where a star spends the majority of its life.
Let me know if you'd like to know more about the stages of a star's life cycle!
