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Aristarchus of Samos (c. 310 - c. 230 BC) was the first we know of (heliocentric is a greek word, not polish). He identified the "central fire" with the Sun, and put the other planets in their correct order of distance around the Sun.

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How did Galileo's observation of Jupiter's moons help to show that the geocentric explanation is incorrect?

Galileo's observation of Jupiter's moons provided direct evidence that not all celestial bodies revolve around the Earth. By observing the moons orbiting Jupiter, he showed that there are objects in the universe that do not orbit the Earth, contradicting the geocentric model which placed Earth at the center of the universe with all celestial bodies orbiting around it.


What theory states that Earth is the center of the universe?

Geocentric Model, Earth centered ) developed by the Ancient Egyptians, e.g. Ptolemy. This model put the earth at the center of the cosmos and the earth is the origin point from which all other objects are referenced by angles. This model is still used in the Right Acension (RA) system.


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Most ancient astronomers thought that all celestial objects revolved around?

Most ancient astronomers thought that all celestial objects revolved around the Earth, due to the geocentric model of the universe. This belief was held until the heliocentric model was proposed by Copernicus in the 16th century.


What is the significance of the number '42' in the book 'The Hitchhiker's Guide to the Galaxy'?

In "The Hitchhiker's Guide to the Galaxy," the number 42 is presented as the answer to the "Ultimate Question of Life, the Universe, and Everything." However, the question itself is unknown, so the answer seems nonsensical. This creates a humorous and thought-provoking theme about the nature of existence and the quest for meaning.

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