<human>:  Who discovered the process of the formation of stars?
<bot>: That would be astronomer Johannes Kepler. He discovered that stars are formed when material falls onto a massive star from a companion star. The companion star is usually a red dwarf star, which is a small star that is cooler and smaller than our sun. The material that falls onto the massive star forms a disk, and then the material spirals inward and eventually forms a new star.