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Whose measurements helped reveal that the Moon was not a perfect sphere?
AstronomyMoon
Quick Answer
Galileo Galilei’s telescopic drawings showed mountains and craters on the Moon in 1609–1610. This contradicted the old idea of a flawless heavenly sphere.
The Full Story
Using an early telescope, Galileo observed that the Moon had shadows, peaks and rough terrain. His sketches in 1609 and 1610 showed that the lunar surface was mountainous and cratered. That was important because it challenged the ancient belief that celestial bodies were perfect and unchanging. It marked a decisive step toward modern planetary geology.
Key Facts
1.Observed in 1609–1610
2.Showed mountains and craters
3.Challenged the idea of perfect heavens
YouTube Angle
Suggested video title for this topic:
"The Moon was once thought perfect—until Galileo looked closer."