Tag: sunspots
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Nation & World
Stars’ age: A well-kept secret
Harvard researchers have found that stars slow down as they age, and their ages are well-kept secrets. But astronomers are taking advantage of the first fact to tackle the second and tease out stellar ages.
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Nation & World
Galileo’s reach
Some four centuries after Galileo observed spots on the surface of the sun, historians, musicians and actors came together at Harvard on Oct. 4 for an all-day conference to celebrate his discovery.