In the university he read articles by Boris Rosing in the field of electronic telescopy. The Fabricius' used camera obscura telescopy to get a better view of the solar disk. He never completed university yet did significant original research in both microscopy and telescopy. They worked on the problem of "electrical telescopy," something Zworykin had never heard of before. Since then, Earth-based telescopy has improved to the point where regular observations can be made.