The earth is round, why is the earth seen flat?

The earth is round because the angle you observe is from the cosmic angle of the earth, and the size of the earth is also macroscopic size, and you see the earth from a large-scale perspective. Take basketball as an example, if its surface is less than a millimeter, it is also flat.

It's a matter of human perspective. An object, the farther away from a person, appears smaller, and the closer it is to a person, the larger it appears. Human beings are on the earth, relative to the earth, a person is like a drop of water in the sea, it is impossible to see the whole earth at a glance, and the earth is an approximate sphere, its surface is a curved surface, people stand on the earth, the place where the curved surface bends down is the horizon, and what you see is the plane.

In high school analytic geometry, a sphere is defined as "an enclosed body of all planes equal to a fixed length to a fixed point".

So the ball can be seen as a myriad of faces, and what you see is only a small part, and because the density of the atmosphere is closer to the ground, the greater the refraction of the distant scene, and the image is level with the nearby ground, so the ground you see seems to be flat!

If there is no atmosphere, the Earth can be told to be round with the naked eye on Earth).

Because the human eye has a limited range of vision.

The earth is too big, and the range of human vision is too small.

The earth is huge. The arc is small.

If you look at the sea, you will see that the ship appears from the other side of the circle.

The earth is too big, the human race is too small!

Yanay and I have the same opinion!

Flat or round, this is a matter of perspective. A long, long time ago, the round sky was still people's understanding of the world. With the development of the seafaring industry, one day it was discovered that ships would disappear from the sea level, and some people thought that the earth might not be square.

Standing on the seashore and looking at the sea-sky intersection in the distance, you can clearly feel that the earth is round, and you can see that the sea level is not horizontal, but arc-shaped.

In addition, in fact, from the moon or space satellites, you can clearly see that the earth is indeed round, in fact, the earth is not round, which has been introduced in the geography class of junior high school.

One might say that since the earth is round, there must be a very slight arc on the ground in theory and in practice, why can't the instrument measure this arc?

If it can't be measured, it can only be said that the method is wrong, or the accuracy of the instrument is not enough. The earth is simply too big for human beings. The volume is trillions of times that of human beings, and we can't see the whole plane of the earth as far as our eyes can see, and the places we can reach are nothing to the curvature of the earth, and the earth as we see it from this point is flat.

Therefore, due to the problem of perspective, ancient people have always believed that "the sky is round and the place is round", which is the limitation of knowledge and imagination.

Why is the earth round.

The reason why the earth is round is because the gravitational force of the earth itself has the characteristics of centripetal, so the shape of the isotope plane formed by the centripetal gravitational force will be a spherical shape, so the shape of the earth will be round, in fact, strictly speaking, the shape of the earth should be elliptical.

The shape of the earth is not a regular spherical shape, but an oval spherical shape that is more bulging than the two poles in the middle of the equator, and this shape is not regular, it is more like the shape of a round pear, so many times, people will also call the shape of the earth "pear-shaped".

As one of the eight planets in the solar system, the earth is the only planet with human activities and survival, and the distance between the earth and the sun is about 100 million kilometers. While rotating from west to east, the Earth also revolves around the Sun. The Earth we live on is now about 4.6 billion years old.

Because the earth is too big and our field of vision is too small, people stand on the surface of the earth and feel as if the ground is flat. When you stand on the beach and watch the sunrise, you will see the sun gradually rising from the place where the water and the sky meet, which means that the earth is round.

This is due to the poor viewing angle, resulting in a narrow view.

On the ground, due to the insignificance of human beings and their inability to see far, the surface of the earth is flat.

Why is the earth round. Quite simply, because it is affected by the gravitational pull of the sun, it becomes a circle or elliptical or an approximate circle when pulled by gravity.

The diameter of the Earth has been measured, but the sky is so vast that the boundaries have not yet been observed. When we look at the sky, our body forms a 360-degree fillet with the sky, so we feel that the sky is round and the earth is flat.

The earth is round and the ground looks flat, because the surface you see is finite, it belongs to the microscopic, you can't see the curvature surface with a radius of 10,000 kilometers, so it looks flat. The sky is an endless universe, but your viewing distance is limited, and you see the same angles, and you scan the cone 180 degrees with the distance of the cone, so it is round.

Other characters, families, masters, slaves.

The Earth is oval.

Earth is the third planet to be from the Sun and the only known object that harbors and supports life. Due to the local undulations, the Earth deviates slightly from the ideal ellipsoid, but on a planetary scale, these undulations and the radius of the Earth.

Relatively small. Most of the Earth's polar regions are covered in ice.

Pivot inclination

The existence of the orbital inclination causes the Earth to revolve around the Sun.

when the sun shines directly on the point.

In the Tropic of Cancer and the Tropic of Cancer.

This is a return year with a mean solar day (i.e., 365 days, 5 hours, 48 minutes and 46 seconds).

The length of day and night and the angle of solar altitude in different latitudes on Earth.

This in turn causes the total amount of solar radiation received by these areas to change in a day, resulting in seasonal variations. When the North Pole is closer to the Sun relative to the South Pole, the direct point of the Sun is located in the Northern Hemisphere.

At this time, the days are long and the nights are short in the northern hemisphere, and the solar altitude angle is larger, which is half a year of summer; The southern hemisphere has short days and long nights, and the solar altitude angle is small, which is half a year in winter; Vice versa.

In the north temperate zone north of the Tropic of Capricorn, the sun always rises in the southeast direction and sets in the southwest direction; In the southern temperate zone, the sun rises in the northeast and sets in the northwest.

The earth is like a circle, not flat. After long-term precise measurements, scientists have found that the earth is not a regular sphere, but an irregular elliptical sphere with slightly flattened equators at the poles, exaggeratedly speaking, a bit like a "pear", called a "pear-shaped body".

Peculiarities of the Earth.

The Earth is an irregular elliptical sphere with slightly flattened poles and slightly bulging equators. The Earth is one of the eight planets of the solar system.

It is the third planet in descending order from closest to the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system.

The air temperature on the Earth's surface is exposed to solar radiation.

The global average surface temperature is about 15. In the depths of the subterranean area, where sunlight is not visible, the temperature is mainly affected by geothermal heat, which increases with depth. The Earth's core at the center of the Earth.

The temperature is more than 6000 meters, which is higher than the surface temperature of the solar photosphere.

In fact, the earth is an ellipsoidal sphere, and for human beings, the ground is indeed flat, why? In fact, there is a simple example, a small thing is based on a very large ellipsoid, and what he sees must be flat. It's like an ant on top of a big balloon, and if you look at the ellipse from the ant's point of view, then it must be flat first, and then you will see that it's a sphere or an ellipsoid at an angle.

Just because the earth is big enough, and human beings are as small as a grain of sand, the ancients have long realized that the earth is arc-shaped, but they can't prove that the earth is spherical, and human vision is still too limited.

In ancient times, people believed that the sky was round and the sky was like a cauldron on the ground, and the earth looked flat, and these observed phenomena became the basis for people's understanding of the earth. There were many scholars in ancient Greece who believed that the earth was spherical, but only guessed, and some of them believed that the spherical shape was the most perfect of all geometry problems. Aristotle guessed that the earth was spherical after observing the lunar eclipse, and Archimedes also guessed that the earth was spherical, but neither could confirm it well.

The event that really made humanity confirm that the Earth was spherical was the European circumnavigation of the world in the 16th century. After that, scientists no longer doubted that the Earth was spherical, but instead guessed the exact shape of the Earth, and Newton calculated that the Earth was slightly flattened and spherical, and the shape near the equator was "thrown out" because of the greater linear velocity. In the 60s of the 20th century, human beings confirmed the shape of the earth through satellites, and later through a variety of telemetry analysis, only to know that the shape of the earth after removing water is not a rule, but generally spherical.

The earth is round, but the earth seen by people is flat, because human beings can only see parts of the earth, and when humans invented satellites, "God's perspective", the truth about the shape of the earth became a common sense. If we live in the center of the earth, not on the surface, we don't even know what shape the earth is, it's a covered cauldron, haha, if you're a Saturnian, the earth you see is a pixel ......It is not clear whether it is round or square, and it is very important to observe with the help of astronomical instruments, after all, the human eye can see things for a limited time.

In fact, the ground is not flat, the ground is also round like the earth, but because the earth is very large and the ground is very broad, the arc of this arc will become very small, so in people's eyes, the ground becomes flat.

It has to do with our perspective, and although our Earth is round, it's a very large circle, and it's hard for us to see the difference on the ground.

That's because the earth is too big, and we humans are too small compared to the earth, and the place where we may feel it is very small, so we have such an illusion.

What is the shape of the earth and why is the earth round but the ground is flat.

Because the Earth is trillions of times larger than our individual human beings, it is impossible for our eyes to see the whole Earth.

When we are placed at a certain point on the earth's surface.

The place we can reach is nothing to the curvature of the earth, and the earth we see is flat.

That's why the ancients thought"The sky is round"for the sake of it.

It was only after the footsteps of modern humans could spare the earth that they discovered that the earth was round.

The Earth can also be seen to be round after a considerable distance from the Earth in space.