How did Galileh find out that the earth is round?

Question

How?

Answer 1

galileo didn't discover that the earth is round, in fact, niether did columbus, as popular myth claims. in fact, people knew the earth was round back before the days of Rome. it was pretty apparent actually, because an object travelling over the horizen disappears slowly starting at the bottom and working its way up. this can only occur on a curved surface.

the debate that SHOULD have prevented columbus from leaving was the fact that people also knew hte SIZE of the earth and knew that there was no way to carry enough supplies on a ship to make it all the way around. in fact, columbus was lucky he was wrong (since he thought that sailing west would bring him to india) and ran into america, otherwise he would have starved to death long before he ever made it to land.

As stated, Galileo contributed to the heliocentric theory, that the sun is the center of the universe, not the the concept of a round earth

Answer 2

Aristotle of ancient Greece was the first or one of the first to surmise that the Earth is round (spherical). His evidence was as follows:
1)Ships disappear from the hull upward, with the last visible part being the top of the mast as they sail away from port. This is true no matter which direction they sail away.
2)During eclipses of the moon, the Earth's shadow is always the arc of a circle on the moon, no matter which direction the eclipse occurs.
3)All things naturally fall toward the center of the Universe, and the Earth is obviously the center of the Universe. The geometric shape that results when matter falls evenly toward a single point is a sphere, so Earth has to be a sphere because of this.
4)Certain very southerly stars can never be seen from northern locations, but become easily visible and higher and higher in the sky the farther south one travels.
Erastothsenes actually calculated the circumference of the Earth at ~25,000 miles, which was essentially correct, but most people of his day did not believe him. He calculated it by noticing that in a town in the far south of Egypt, on the summer solstice, sunlight would shine all the way to the bottom of a well at high noon. However, on that same day sunlight would be slanted by 7 degrees at high noon in Alexandria where he lived, and there was never a day when it would shine all the way to the bottom of a well. Since he knew the distance from Alexandria to that little town, the circumference of the Earth became a simple arithmetic calculation.

Answer 3

The history says that the man observed this from this following . A man was standing near sea shore and he was watching the ship which was moving from the shore.First the bottom of the ship dis appeared then slowly the top portion of the ship dis appeared. If the earth is flat it should not disappear from bottom to top. If a man stand on a globe and any article moves on the surface you can notice that first the bottom potion will dis appear.This has helped to find the shape of the earth as globe.

Answer 4

Did'nt he observe that all the other heavenly bodies were round and thus so must the earth ? That's how I would have done it but I have no idea ! You know you could get the answer from wiki how come people ask questions that are easily researchable ?

Answer 5

I don't know if Galileo should get all the credit. Lots of philosophers helped to answer this question. Think about a ship traveling over the horizon. If the earth wasn't circular...think about it.

Check out this Wikipedia article, it might give you some insight.

Answer 6

I have no idea who you mean. Galileo helped Copernicus's theory of a sun centered galaxy, not proved the earth is round.

Answer 7

He ran all the way around in a staright line, without turning once. The path he ran is now called the equator.

Answer 8

He walked to the edge and didn't fall off