General English
- Sun
- Earth
- energy
- source
- star
- planet
Academic English
- major
- portion
- ordinary
- hydrogen
- helium
- packed
- pressure
- create
- atom
- core
- reaction
- enormous
- gravity
- diagram
- collide
Discipline-specific vocabulary
- Nuclear fusion
- thermonuclear
- electromagnetic radiation
- visible light
- ultraviolet light
- radiation
- radio waves
- subatomic