Earth science

Main sequence

The current stage of the sun, where it fuses hydrogen and helium in its core.

Red Giant

A future stage of the sun when it expands and becomes much larger and cooler on the surface

White Drwarf

The small, dense core left behind after the sun sheds its outer layers: it slowly cools over time

Core

The Central part of the sun where nuclear fusion occurs.

Planetary Nebula

The outer layers of the Sun that are ejected into space near the end of its life

Stellar revolution

The life cycle of a star, including all stages from formation to the endd of its life

Luminosity

The total amount of energy a star emits; it changes as the sun evolves

Supernova

The explosive end of a massive star , note that the sun will not become a supernova