How was the earth made 2

The creation of the earth

This chain of unbelievable coincidences led to the fact that life could develop on the once desolate celestial body.

If the earth were only about five percent closer to the sun, all water would evaporate and no life would be possible. The size also has an influence on the living conditions: If the earth were smaller, it would, like Mars, have now completely cooled down.

If it were larger, violent volcanism would presumably make higher life impossible. This underlines the uniqueness of our planet, which to this day is the only one that we know has life on it.

The birth

The origin of the solar system: billions of small celestial bodies and dust particles buzz around the sun. Over the course of several tens of thousands of years, some of them have clumped together to form larger chunks of rock and ice, some several hundred kilometers in size. From one of these bodies the earth will arise after many millions of years.

At this early stage, the earth cannot be recognized at all: it is neither spherical nor blue. The stabilizing moon is missing and the earth is staggering through space.

It is bare and extremely hot because it is under constant fire from stray boulders, which release enormous heat when impacted. Seas of lava emerge, the unplaned block slowly takes on the shape of a glowing ball.

The planet is still growing, but is now two-thirds of its current size. Heavy metals such as iron and nickel migrate into the depths and form the huge core of the earth.

The earth rotates much faster than it does today, it only slows down over time - the influence of the moon will be decisive for this later.

The crash

70 million years after the sun first lit up, a collision occurs that our planet barely survives. A celestial body with the mass of Mars is on a collision course with the Earth. The giant bullet crashes into our planet at around 36,000 kilometers per hour.

Fortunately, it is not a head-on hit - it would probably have torn the earth apart - but the oblique impact is still so violent that large parts of the earth's mantle are torn away and thrown into space. Together with the remains of the impact body, it forms a rock cloud that circles the earth.

Gradually the cloud cools down, the orbits of the particles become more ordered until they form into a disk. When the particles collide, they clump together to form a larger chunk, the moon, which is held in a permanent orbit by the gravity of the earth.

The satellite, however, in turn exerts a force of attraction on the earth and deforms the globe a little. This creates frictional forces that ensure that the earth's rotation is steadily slowed down. That is why the days are getting one second longer every 40,000 years.

In the distant future, the sun will only rise once per lunar period, i.e. a day will last a good month.