Morgan-Keenan (MK) Classification

The Morgan-Keenan (MK) Classification is a system used in astronomy to categorize stars based on their temperature and brightness. It divides stars into different classes, primarily using letters like O, B, A, F, G, K, and M. These letters indicate a star’s temperature, with O being the hottest and M the coolest. The classification helps astronomers understand a star's characteristics, such as color and lifecycle. For example, the Sun is classified as a G-type star. This system is essential for studying the properties and evolution of stars in the universe.