Scientists Discover Milky Way's Youngest Exploding Star (2/2）

"Large spiral galaxies like the Milky Way seem to have two or three per century. But it is clear we have not been getting our share. A half dozen or so have been reported over the last millennium, but there should be 20 or 30. Now the galaxy is full of gas and dust, which could hide a distant supernova optically, but the remnant would still produce detectable radio waves and X-rays. This lack is a significant puzzle."

The discovery of the young remnant does not immediately provide an answer to the puzzle, but scientists say it will be a "goldmine" to study, since it is still so recent and energetic. They say it is an important finding for understanding the life cycles of stars in the Milky Way galaxy.

Bob Kirshner, of Harvard University, explains why supernovae are important for all of us.

"The supernovae make the chemical elements through real alchemy, transforming one element, the light elements into the heavy ones. So the calcium" class="hjdict" word="calcium" target=_blank>calcium that is in your bones and the iron that is in your blood probably came from supernovae that exploded before the sun formed. So, we are all stardust, and it seems reasonable for us to want to know how these elements get formed when stars explode."

参考译文：

像银河系那样螺旋状的大星系每世纪似乎会出现两到三个。但是可以确信的是我们还没有完全发现。在过去的一千年里，本应该出现20到30个的超新星，报导出来的有六个左右。现在，星系充满了气体和灰尘，掩盖了遥远的超新星的可见性，但是（它的）残骸依然放射出可检测的无线电波和X射线。超新星的残缺是一个重要的未解之谜。

年轻残骸的发现并没有立刻给出谜底答案，但科学家说，因为它依然如此年轻和活力四射，将是做研究的"黄金宝库"。他们说它是弄明白银河系恒星生命周期的一个重要发现。

哈佛大学的鲍勃·克斯勒解释了为什么超新星对我们所有人都很重要。

"超新星通过真正的点金术制造化学元素，把一种元素，轻的元素转变成重的。所以，你骨骼里的钙和你血液里的铁很可能来源于太阳系形成前超新星的爆炸。所以，我们都是星团，这对我们而言似乎是合理的，我们想知道当恒星爆炸时，这些元素是怎么形成的。"

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