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Stars commit about 90% in their lifetimes fusing hydrogen into helium in large-temperature-and-stress reactions inside their cores. Such stars are reported to generally be on the primary sequence and are called dwarf stars. The Crab Nebula, remains of a supernova that was first seen all-around 1050 Advert A star is https://prefabricated-house72603.rimmablog.com/35178533/star-fundamentals-explained

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