 | 1- the hadean eon of the precambrian era Heavier elements are generated within stars by nuclear fusion of hydrogen, and are otherwise uncommon. We can see similar processes taking place today in so-called diffuse nebulae in this and other galaxies, such as the Nebula M16 156.89 Kb.  4 | read |
 | W 91st Ln Arvada, co Experienced and educated in managing projects from conception to completion. Experienced in teaching at the college level to both undergraduate and graduate students 42.59 Kb. 1 | read |
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