A star is a gaseous luminous body of plasma held together by gravity.It does not have any solid matter.Stars like our sun,contains elements like hydrogen,helium,iron, calcium,and magnesium.Elements in cooler stars are nearly liquid in form,like boiling iron in a blast furnace.
The total mass of a star is the principal determinant in its evolution and eventual fate. Other characteristics of a star are determined by its evolutionary history, including diameter, rotation, movement and temperature. A plot of the temperature of many stars against their luminosities, known as aHertzsprung-Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
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