Newton was well known for his research on gravity , and he worked on many other scientific research that he discovered during his life.
Newton developed the three laws of motion, which are the basic principles of modern physics, and included his work in optics study white light.
He also invented lenses that reflect telescopes, which provided clearer images in a smaller telescope than refractive models at the time.
Besides, he developed countermeasures in counterfeit currency in his later years, and calculus was one of his most important works.