A star is made of hot gas.
2- Type of stars?
Super giant, Giant, Main sequence, White Dwarfs.
3- H-R Diagram?
H-R diagram is a graphical tool that astrotomers use to classify stars of their luminosity,spectral type, color, temperature and evolutionary stage.
4- Nuclear Fusion?
The nuclear reaction inside a star change two hydrogen gas molecules into a helium molecule.This process is known as nuclear fusion.
5- The life cycle of a star
