What is the most common type of star in the Milky Way galaxy?

The most common type of star in the Milky Way galaxy is the red dwarf. Red dwarfs are small, cool stars that are much fainter than the Sun. They make up about 70% of all stars in the Milky Way and can be found in all parts of the galaxy, from the galactic center to the outer edges.

Red dwarfs are not only the most common type of star in the Milky Way, but also the universe. They are long-lived stars, with lifetimes of trillions of years, and many are believed to be older than the universe itself. Because they are so faint, they are difficult to observe directly, but astronomers have found ways to detect them using a variety of methods.