Undaunted, he built his own telescope in 1926. The results did not satisfy him. So he self-educated in the science of [[optics]], and built two more telescopes. He ground his own lenses and mirrors to build these. He drew the solar system (as it was then known) from his observations, and sent his drawings to the [[Lowell Observatory]] in [[Arizona]] on or about 1928. The drawings impressed the directors, who invited him to join its staff. | Undaunted, he built his own telescope in 1926. The results did not satisfy him. So he self-educated in the science of [[optics]], and built two more telescopes. He ground his own lenses and mirrors to build these. He drew the solar system (as it was then known) from his observations, and sent his drawings to the [[Lowell Observatory]] in [[Arizona]] on or about 1928. The drawings impressed the directors, who invited him to join its staff. |