How people proved that the earth is round 5

How to prove that the earth is round?

In fact. The earth is elliptical because it rotates.

because of the action of centrifugal force).

It is indeed not very good to use tools that are easy to obtain for ordinary people, otherwise the ancients would have figured it out a long time ago. But the following material is enough to illustrate.

First of all, if the earth is flat, then even if only one part of the earth's surface is an arc, the sea level on the arc should be flat, not arc. Only if the earth is a spherical line can the sea level on the arc also be arc. So it's doable.

Second, the projection of the Earth on the surface of the Moon during a lunar eclipse is not always formed in a fixed place on the Earth. But it is round at all times, so the surface of the earth should be round.

There is one more, such as climbing high and looking far away. If the earth is flat and there is nothing in the way, then it should be the same far no matter how high you look, but in fact, no matter where you are on the earth, you will be looking far away. So the earth is round.

Earlier people found that when they saw a ship in the distant sea, they saw the mast first, and then the whole ship could be seen from high to low, which proved that the earth was round. If the earth is flat, it is not seen from high to low, but either all or not.

The head is round, the wheel is round, the football is round, the eye is round, the planet is round, the star is round! So the universe is also round!

The ** shot in space can be proven.

The sun on the same day has different angles of altitude in different places.

The easiest way to do this is via satellite**.

Through Magellan's circumnavigation of the globe, lunar and solar eclipses, poles and sights, altitude and sight, satellites**.

Magellan's circumnavigation of the world, lunar eclipse, solar eclipse, altitude and line of sight, satellite**.

Travel around the world through Magellan.

There are many phenomena in life that can indicate that the earth is a sphere, and the common ones are as follows:

1. The most common one: the sun rises in the east and sets in the west, this phenomenon is enough to prove that the earth is a sphere.

2. Sea level.

The ships that come from afar, always see the mast first, and then the hull, which can also prove that the earth is a sphere;

3. Standing high and seeing far away can show that the ground plane is an arc, and it can also show that the earth is a sphere;

4. When a partial lunar eclipse occurs, the earth blocks part of the sunlight, so that the shadow of the earth is projected on the surface of the moon, just like looking in a mirror for the earth, so that we can see the shape of the earth's sphere, which can also show that the earth is a sphere.

Ways to prove that the earth is round:

1. The horizon is arc-shaped;

2. When a ship on the sea level comes from afar, it always sees the mast pin rod first, and then the hull of the ship, which proves that the earth is spherical;

3. During solar and lunar eclipses, observe the moon, and the solar eclipse always has a certain arc. prove that the earth is round;

4. Magellan's circumnavigation of the world;

5. When a partial lunar eclipse occurs, the earth blocks a part of the sunlight, so that the shadow of the earth is projected on the surface of the moon, just like looking in a mirror for the earth, so that we can see the shape of the earth's sphere.

Here are a few events that can prove that the Earth is round:

1. At sea, when a distant ship comes towards us, we will first see the mast of the sail.

2. In places not on the equator, whirlpools will form when the water in the container leaks out of the small hole.

3. Where it is not on the equator, hang a pendulum and let it swing in the east-west direction, and it will slowly form a conical pendulum, that is, the pendulum of the pendulum will be rounded.

4. Magellan sailed in one direction and finally arrived at the departure point.

5. During solar and lunar eclipses, the Earth's shadow cast on the Sun and Moon is always arc-shaped.

The first to propose that the earth is round:

The ancient Greek mathematician Pythagoras, who lived in the 6th century BC, believed that the earth was spherical from the point of view that the sphere was the most perfect geometry. In addition, Pythagoras also formulated the mathematical rules for the circular motion of celestial bodies, and proposed the idea that the sun, moon and planets should move in a circular motion. The Earth revolves along a spherical surface around a "fire" at a fixed point in space, and on the other side there is a "Earth Star" balanced with it.

This kind of thinking had an important influence on Copernicus's "heliocentrism" theory in later generations. Pythagoras put forward the idea that the earth is spherical in the 6th century B.C., and put forward the corresponding conjectures and reasoning, which is undoubtedly unprecedented. But Pythagoras only made this argument and did not give a strong basis for everyone to accept it, and the process was actually very long.

After Pythagoras, Plato, a master of deductive reasoning, further refined the idea of the great earth shape, he believed that the form of symmetry is one of the properties of perfection, and the place where human beings live should also be symmetrical, symmetrical up and down, symmetrical left and right, all kinds of symmetry, can only be spherical.

The real scientific proof of the "spherical big talk" was Aristotle, the most learned man of ancient Greece, who proved it through many of his own observations and discoveries. For example, the further north you go, the higher you will see the North Star above the ground, and the further south you go, the lower you will see the lowest Polaris above the ground, which would not be the case if the ground was flat.

After that, many scholars in ancient Greece made various data measurements of the earth on the basis of Aristotle, and Ptolemy's "Guide to Geography" shocked the world.