Unveiling the Secrets: Determining the Age of Planets and Stars

Astronomers determine the age of planets and stars by studying various factors. For stars, they compare measurements of brightness, color, spin speed, and magnetic activity to mathematical models that predict stellar evolution. They also use a method called asteroseismology, which studies vibrations on the surfaces of stars caused by waves traveling through their interiors. For planets, scientists rely on radionuclides, special atoms that release energy over time, to determine their ages. They also count craters on rocky surfaces and study the distribution of meteorites. The accuracy of these estimates is confirmed by comparing the ages of rocks in our solar system to the age of the Sun.