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Physics

Asteroseismology: Probing Stellar Interiors and Ages

Quick fact

Asteroseismology allows astronomers to measure a star's internal rotation, composition gradients, and age to within a few percent, something no other technique can achieve for distant stars.

Why this is interesting

When you look at a star, it seems calm and unchanging. But inside, every star is vibrating like a giant bell—how can listening to those vibrations reveal the star's age?