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。

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

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克莱斯勒现任总裁鲍勃·纳德利在破产过程中将继续留任，预计这将持续到6月下旬。

Chrysler's current chief executive Bob Nardelli will stay in his job during the bankruptcy proceedings, which are expected to last until late June.

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