The stars

what is a star? a star is a giant ball made of hot gas. They have different color for example red, blue, orange, white, yellow, and they have different size some are small, giant, and super giant.

Types of stars are White Dwarf, Main Sequense, Gigants and Super Giant.

H-R Diagram is a diagram that scientists use to classify stars they use temperature, luminosity and size of stars.

Nuclear Fusion is when two hydrogens get together and make heat and energy.

The Life Cyclo of a Star: it start with the stellar nebula and in the stellar nebula start a process called nuclear fusion that is when two hydrogen get together and it form a baby star and than it turn into a red giant or red super giant and than it turn into a planetary nebula or supernova and than it turn into a White Dwarf, neutron star or a black hole.