what is the define of stars?
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A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. ... Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, its luminosity, and spectrum.
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A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. ... Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, its luminosity, and spectrum.
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