Astronomers have known since the 1950s that the chemical element carbon is made in old , red giant stars 天文学家早在50年代已经知道,碳这种化学元素是在年老的红巨星内形成。
Systems as diverse as the early universe , the interstellar medium , red giant stars , and supernova explosions are currently the focus of intense studies utilizing sophisticated computer models - models which require large quantities of nuclear data as input 如早期的宇宙,星际介质,红巨星,超新星爆, x -射线爆和-射线爆等多样的系统,这些核天体过程是利用复杂的计算机模型,进行重点研究的焦点。
Composed of micro diamonds , aluminum oxide , and silicon carbide , the isotopic distribution of these grains bore the telltale marks of their birth : ancient supernovas and red giant stars , that shone brightly and then flickered out , billions of years ago , before the birth of the solar system 由微金刚石、铝氧化物、碳化硅组成的这些微粒的同位素分布透露出它们的诞生:那些数十亿年前,在太阳系尚未诞生时,曾经闪耀并最终熄灭的古老超新星和红巨星。
英文解释
a large, old, luminous star; has a relatively low surface temperature and a diameter large relative to the sun 同义词:red giant,