Astronomy
Asteroseismology: Using Stellar Vibrations to Probe Internal Structure
Quick fact
Asteroseismology allows astronomers to determine a star's mass, age, and internal rotation with precision comparable to what we know about the Sun, by measuring its oscillation frequencies—similar to how tuning forks reveal physical properties.
Why this is interesting
You've seen stars twinkle, but what if some stars actually hum and ring like a bell? How can listening to a star's vibrations reveal what's inside?