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Assessment
Who is credited with the development of the first astronomical telescope?
Galileo Galilei
Johannes Kepler
Isaac Newton
Tycho Brahe
What year did Galileo Galilei improve the design of the telescope?
1609
1610
1590
1620
Which celestial bodies did Galileo first observe with his telescope?
The moons of Jupiter
Saturn's rings
The Andromeda galaxy
The sun's spots
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