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Gruppo fotografico dei partecipanti al Corso fuori testo
H WRUBEL Construction of stellar models
GRATTON Associations and very young clusters
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absorption abundance associations assume become binaries BURBIDGE calculations close clusters compared components composition computed consider constant contraction convective core corresponding cosmic rays curve density derive described detailed determined diagram discussion distance effect electrons elements emission energy equation equilibrium evolution evolutionary fact factor flux function galactic galaxies give given halo helium hydrogen important increase layer less light limit lines loss luminosity magnetic field magnitude main sequence mass material matter mean method models motion nebula neutron normal nuclear nuclei observed obtain occur origin particles period phase physical possible present probably problem produced radiation radius range ratio reached reactions recent region relation relative rotation solar sources spectral stars stellar suggested supernova surface temperature theory tracks variables velocity zone