After observing thousands of extrasolar planets discovered by the Kepler Space Telescope, researchers found that there are a large number of planets in the Milky Way, and there are planets around almost every star
80% of the 200 to 400 billion stars in the Milky Way are red dwarfs, and more than half of the red dwarfs are surrounded by planets similar to the Earth, with water and atmosphere.
 There are two to six planets in many star systems, of which about one third of the planets is in the habitable zone, and the temperature of the planet's surface is suitable for the existence of liquid water, which may mean that there are habitable planets almost everywhere in the Milky Way