It is estimated that the Earth was formed by agglomeration of matter attracted to each other by the action of gravity, about 4.5 billion years ago. And the same can be generalized for the rest of the components of the Solar System.
The hypothesis that is currently most accepted, considers that the formation of our planet was linked to that of the Sun. After the explosion of a possible supernova, a cloud of dust and interstellar gas remained (what is known as nebula) that was concentrating until it ended in a gravitational collapse.
In other words, the blast-shaped repulsion scattered matter over a wide region of space. This generated what would be the original solar nebula that, by concentrating on growing bodies, would constitute the Sun, planets, asteroids, comets, etc.
This shared origin is supported by each new rock brought or analyzed during space expeditions made to different elements of our Solar System. Once the general chemical analysis of the rocks and their approximate dating is obtained, nothing contradicts the similar origin of all the components of the Solar System from a possible supernova that ended up exploding.
Even today the satellites capture radiations and echoes of the original explosion or great explosion that formed the Universe, the Big Bang in English. These echoes are collected in the form of visible light that reaches us from different stars and that tend towards the red color strip. This phenomenon is called redshift and, in a practical way, it means that the bodies that emit red light are moving away from us.
Matter in the universe continues to expand, separating itself from the original point where whatever exploded in the Big Bang was and about what even astronomers still disagree. On the contrary, if we observe an object that emits bluish light, we will deduce that the object approaches us.
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