In the university he read articles by Boris Rosing in the field of electronic telescopy.
From the en.wikipedia.org
Since then, Earth-based telescopy has improved to the point where regular observations can be made.
From the en.wikipedia.org
Despite ingenious techniques of optical and radio telescopy, astronomers have piled up more questions about Mars than answers.
From the time.com
The pair soon invented camera obscura telescopy so as to save their eyes and get a better view of the solar disk, and observed that the spots moved.
From the en.wikipedia.org
The pair soon used camera obscura telescopy so as to save their eyes and get a better view of the solar disk, and observed that the spots moved.
From the en.wikipedia.org
More examples
The art of making and using telescopes
(telescopically) in a telescopic manner; "each of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes"
A telescope is an instrument designed to aid the observation of remote objects by collecting some form of electromagnetic radiation (such as visible light). The first known practical telescopes were invented in the Netherlands at the beginning of the 17th century. ...