What makes the planet habitable?

There are several reasons why the earth is habitableThe distance between the sun and the earth is moderate, and the temperature is suitableAtmosphereProtect it as well as it's a rocky planet

1. The distance between the sun and the ground is moderate

The Earth is neither too close nor too far from the Sun, and receives just the right amount of light, allowing plants to use the sun's light energy for photosynthesis.

Stores the energy needed for life activities, and when a vegetarian eats a plant, this stored energy goes to the vegetarian animal, and when a carnivore eats a vegetarian animal, the energy goes to the carnivore...... bodyIn this way, it is the light energy of the sun that activates the life machinery of animals and plants on the earth, so that the descendants of animals and plants can flourish and live endlessly.

2. Suitable temperature

The right temperature on earth is necessary for life activities. The energy required for life activities is supplied through metabolism, and a supercold or overheated environment is not conducive to the normal progress of metabolism, and only at the right temperature can plants effectively carry out photosynthesis.

3. The earth has an atmosphere

The Earth is protected by an atmosphere, which is by no means optional for the life that inhabits it, because the atmosphere blocks the intense ultraviolet rays from space.

to save life on Earth from harm; The atmosphere blocks most of the meteorites that crash into the Earth, so the Earth's surface does not resemble the Moon.

The surface is so pitted.

4. The Earth is a rocky planet

The core of the Earth is melted magma.

The main component of magma is iron. Rotation of the Earth.

During the process, a strong magnetic field is generated in the ferrous core. This magnetic field envelops and protects the Earth. When the sun storms.

That is, when a stream of high-speed charged particles from the sun hits the earth violently, the magnetic field that surrounds the earth blocks it in space, thus protecting life on the earth.

Scientific studies have shown that at present, there is no planet more suitable for human habitation than Earth. However, some people are deeply puzzled by this, and some even believe that there are human beings living on planets other than Earth.

And what is the basis for the above research results proposed by scientists?

First of all, the Earth is at a moderate distance from the Sun, not too close and not too far away. This will allow the plants to receive the right amount of light and provide solar energy to the plants for photosynthesis. Moreover, the sun can directly provide light and heat resources for the earth, and the growth and development of life on the earth is inseparable from the sun.

In addition, solar radiation maintains the earth's surface temperature and is the main driving force for the movement of water, atmosphere and organisms on Earth. Therefore, the moderate distance between the earth and the sun, so that the earth can get stable solar light, is an important condition suitable for human habitation. The other planets are either too far away from the Sun or too close.

Secondly, the planetary motion in the universe has the same characteristics: coplanarity, isotropy, and near-circularity, and the planets go their own way without interfering with each other, which also forms a safe space orbit of the earth, which is conducive to human survival.

This is the external condition of the earth that is suitable for human habitation. And the earth itself has superior conditions for the existence of life that other planets do not have.

There is a suitable temperature on Earth. The energy required for life activities is supplied through metabolism, and a cold or hot environment is not conducive to the normal progress of metabolism, and it is not conducive to the normal activities of life. Therefore, the right temperature is necessary for life activities.

Atmospheric protection is by no means optional for life on Earth. And the earth has a suitable atmosphere and important atmospheric protection. It can block strong ultraviolet rays from the universe and protect life on Earth from harm; It can block most of the meteorites that crash into the earth and protect the home of human survival; It can evenly dissipate the sunlight that hits the earth's surface, avoiding drastic ......changes in the earth's temperatureWithout a suitable atmosphere and vital atmospheric protection, the Earth would be a desolate and isolated sphere with no life.

Life is inseparable from water, and there is plenty of water on the earth, which also provides suitable conditions for life to survive.

Despite the existence of life on Earth, Earth is nothing more than an ordinary planet. Because its appearance and geographical location are nothing special compared to other planets. The earth is special only because it has life.

However, the conditions of the earth suitable for human habitation are not available on other planets. Of course, there are also many blind scientists who are studying whether other planets are suitable for human habitation, and have made discoveries worthy of research. Perhaps, in the near future, with the development and progress of science and technology, human beings will really "excavate" another "earth".

But by far the most inhabitable planet for humans is Earth. The earth is the home of our human beings and the cradle of our life.

What should we do if the earth is no longer habitable? What solutions do scientists offer?

Option 1: Find a nearby "temporary residence".

If you can't find a planet suitable for migration for the time being, or if you find it, and you can't go there for a while, then live in the space station for the time being. At present, there is no space station where all humans can move, but there are preliminary models, such as our "Tiangong" space station. China has also built a simulated experimental system on Earth, the Yuegong-1, to test the possibility of a human base on the moon.

Option 2: Find a "new home".

In 2015, the United States announced the discovery of an exoplanet very similar to the Earth - Kepler-452b, which is considered by scientists to be a "second Earth". Kepler-452b orbits the star Kepler-452, and the distance between the two is almost the same as that between the Earth and the Sun. However, because the distance is so far away, scientists can only estimate and guess it based on some data, so it has not yet been determined whether it is suitable for human habitation.

A new study suggests that there may be as many as 300 million potentially habitable planets in the Milky Way, which should be good news.

The Earth is a habitable planet, and the first reason for this is that there is water and air on it. The earth has the core, mantle, and crustal structure inside the earth, and the hydrosphere and atmosphere on the outside of the earth.

and magnetic fields. The earth is the only celestial body in the universe where human beings know that life exists, and it is home to millions of creatures, including human beings.

The Earth's equatorial radius is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40076 kilometers. The surface area of the earth.

100 million square kilometers.

Of these, 71% is oceanic and 29% is land, and the Earth appears blue when seen from space.