Question

how did galileo measure the distances between the observed celestial bodies?
a using the telescope with a specific method
b by estimating with his naked eye
c using a ruler
d using mathematical calculations
question 8 (1 point)
what was the significance of observing thestarlets sometimes following and sometimes preceding jupiter?
a it showed they were revolving around jupiter
b it demonstrated the earths rotation
c it proved they were fixed stars
d it disproved the existence of other planets
question 9 (1 point)
according to galileos observations, how long did it take for jupiter and its moons to complete their revolution around the center of the universe?
a 1 year
b 4 years
c 12 years
d 24 years

Explanation:

Galileo used his telescope and specific observational methods to study celestial - bodies. The changing positions of the 'starlets' relative to Jupiter indicated their revolution around Jupiter. Jupiter and its moons take about 12 years to revolve around the Sun (the 'center of the universe' in a heliocentric view).

Answer:

Question 7: a. using the telescope with a specific method
Question 8: a. It showed they were revolving around Jupiter
Question 9: c. 12 years