Question

question 10 1 pts galileo challenged the idea that objects in the heavens were perfect by __________. inventing the telescope showing that heavy objects fall at the same rate as lighter objects measuring the properties of supernovae proving keplers laws were correct observing mountains on the moon

Explanation:

Galileo used his telescope to observe mountains on the Moon, which showed that celestial bodies were not perfect and smooth as previously thought. Inventing the telescope was a tool - making achievement, not a direct challenge to the perfection idea. Showing objects fall at the same rate was about motion on Earth. Measuring supernovae properties was not Galileo's main contribution against the perfection idea. Proving Kepler's laws correct was not related to challenging the perfection of celestial objects.

Answer:

observing mountains on the Moon