... the temperature and density of the core are risen up quickly in stars. In this stage, some Ne and Mg isotopes are synthesized. At the temperature of 30 MK, the hydrogen burning can continue ... we can study and stars, and nuclear physics is a key to access As mentioned above, and particles via nucleosynthesis.formation and evolution of objects in the universe is to study the isotopes ... the isotopes in nature. By investigatingthe planets and the celestial objects, As can be seen in Fig.1Solar system is very high. In the mass region above Iron, are also set as peaks atstars,...