Final answer:
Galileo's telescopic observations of Jupiter and its moons supported the Copernican hypothesis by challenging the geocentric view and showing that not everything had to revolve around Earth. His observations of the moons orbiting Jupiter and the phases of Venus provided evidence that supported the heliocentric theory proposed by Copernicus.
Step-by-step explanation:
Galileo's telescopic observations of Jupiter and its moons provided evidence to support the Copernican hypothesis. By observing Jupiter's moons, Galileo found that they revolved around Jupiter and not Earth, demonstrating that not everything had to revolve around Earth. This challenged the geocentric view and supported the idea that planets could have their own centers of motion. Galileo's observations also showed that Venus goes through phases like the Moon, which was inconsistent with the Ptolemaic model and supported the heliocentric theory proposed by Copernicus.