M-type refers to a classification of stars known as M dwarfs or red dwarfs. These stars are the smallest and coolest in the main sequence category, with surface temperatures below 3,500 Kelvin. M-type stars are abundant in the universe and can burn for billions of years, making them long-lived compared to larger stars. Due to their low brightness, M-type stars are often difficult to observe with the naked eye. However, they are of great interest in the search for exoplanets, as their stable environments may support the development of life. exoplanets, M dwarfs, red dwarfs