The heliocentric theory that Galileo supported stated that the Sun was the center of the universe.
<span>Steel that is strong but cheap could be used for bridges and skyscrapers because for something needed to be so dependable,it would of had to go through extensive quality control. And the steel producer would have to prove it can hold up and explain why it's cheap.</span>
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Answer: C
Explanation: The Moon has phases because it orbits Earth, which causes the portion we see illuminated to change. The Moon takes 27.3 days to orbit Earth, but the lunar phase cycle (from new Moon to new Moon) is 29.5 days.