some telescopes were incredibly long—up to 20 or 30 feet! to move and position them, astronomers built rigs…

some telescopes were incredibly long—up to 20 or 30 feet! to move and position them, astronomers built rigs with pulleys and masts. however, even a slight vibration—like wind or a passing vehicle—could cause the telescope to wobble and lose focus. through trial and error, astronomers began building observatories—special structures that housed telescopes. these observatories protected the telescopes from environmental factors like wind and temperature changes, improving the quality of the images they captured. -windows to the universe: revolutions in astronomy which choice correctly identifies the problem in the passage? telescopes were too short to capture distant images clearly. vibrations and environmental factors caused telescopes to lose focus. astronomers lacked the abilities to build telescopes. observatories were not large enough to house advanced telescopes.

Answer