Unveiling the Secrets: Determining the Age of Planets and Stars

Astronomers determine the age of planets and stars using various methods. For stars, they compare subtle changes in brightness and color over time to mathematical models that predict stellar evolution. They also study the spin speeds and magnetic activity of stars, as well as use asteroseismology to analyze vibrations on their surfaces. Determining the age of planets is more challenging, but scientists use radionuclides to date rocks and meteorites in our solar system. They also count craters on rocky surfaces and study the distribution of meteorites for giant planets. These methods provide estimates of planetary ages, which are often consistent with the ages of their host stars.