What's a star?
A star is a ball made up of hot air and gas.
Types of stars.
Theirs many different types of stars for example theirs the; super giants, the giants, the white dwarfs and the main sequence that has the rest of different stars.
H-R diagram.
Stars have sections to determinate their characteristics, their color, temperature, luminosity, massive/size,and type. their energy is made by a process call nuclear Fusion. Nuclear Fusion is when two hydrogen molecules torn into a helium molecule. the life cycle of a star begins when is a stellar nebula to a sun-like star goes to a red giant to a planetary nebula to a white dwarf and black dwarf.
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