How did Galileo know the Earth was not the center of the universe?

' Galileo had seen three of Jupiter''s four largest moons, effectively proving the Earth was not the center of the universe.

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Thereof, what is the fastest moving material in the universe?

ipping through space at mind-numbing speeds of 30 million miles per hour are now the fastest objects in the universe. Washington: Runaway planets zipping through space at mind-numbing speeds of 30 million miles per hour are now the fastest objects in the universe, says a study. How long was a day 5 billion years ago? According to it, the first evidence of life, 3.5 billion years ago, happened when the day lasted 12 hours. The emergence of photosynthesis, 2.5 billion years ago, happened when the day lasted 18 hours.

Will sun burn out?

But in about 5 billion years, the sun will run out of hydrogen. Our star is currently in the most stable phase of its life cycle and has been since the formation of our solar system, about 4.5 billion years ago. Once all the hydrogen gets used up, the sun will grow out of this stable phase. How old is the Earth? Today, we know from radiometric dating that Earth is about 4.5 billion years old. Had naturalists in the 1700s and 1800s known Earth's true age, early ideas about evolution might have been taken more seriously.

How old is the universe?

13.8 billion years old Such a figure was rather mind-blowing and also pretty baffling. As astronomer Howard Bond of Pennsylvania State University pointed out, the age of the universe - determined from observations of the cosmic microwave background - is 13.8 billion years old.