Physics
Giant clouds of lead glimpsed on distant dwarf stars
A lead balloon is a metaphor for something unpopular, but giant clouds of the heavy metal are helping to boost a theory of star evolution
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A lead balloon is a metaphor for something unpopular, but giant clouds of the heavy metal are helping to boost a theory of star evolution
NASA might not be able to save its damaged space telescope Kepler, but it could begin a second career spotting new worlds with a gravitational lens