A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. The nearest star to Earth is the Sun. ... Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations.
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A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. The nearest star to Earth is the Sun. ... Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations.