According to scientists, millions of years ago, the entire universe was a huge, hot, dense mass, and about 13.8 billion years ago, that mass exploded. This is what is known as the BIG BANG, a huge explosion that is expanding.
The matter is very dense and is transformed into thousands of pieces that were thrown in different directions, at a speed very close to the speed of light. They slowed down. Time passed and a few other masses remained close together forming what we know today as a galaxy. One galaxy in particular we are interested in, the one we now call MILKY WAY. We are interested because we are part of it. A glowing sphere is our Sun, a star like millions of stars that were forming. forming. The small masses orbiting around it also condensed, some more than others, forming the planets and planetary others, forming the planets and satellites.
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