The most common type of star in the universe is the red dwarf star. Red dwarfs are small and cool stars, with masses ranging from about 0.07 to 0.6 solar masses. They make up approximately 70-80% of all stars in the Milky Way galaxy. Red dwarfs burn their hydrogen fuel very slowly, giving them lifespans that can exceed tens of billions of years, far longer than larger stars. Their dim luminosity makes detecting them challenging, but they are essential for understanding stellar evolution and the potential for planetary systems around them. Some exoplanets orbiting red dwarfs may also have conditions conducive to life.