Yes! If we're going to start somewhere, we may as well start from the beginning. Most people have heard of the Big Bang since it is our best explanation for how the universe came to be the way we observe it to be today.
Most astronomers believe the Universe began in a Big Bang about 14 billion years ago. At that time, the entire Universe was inside a bubble that was thousands of times smaller than a soap box. It was hotter and denser than anything we can imagine.
Then it suddenly exploded. The temperature of the universe was about hundred billion degrees Celsius. In a fraction of a second, the Universe grew from smaller than a single atom to bigger than a galaxy. And it kept on growing at a fantastic rate. It is still expanding today.
When the universe began, it was just hot, tiny particles mixed with light and energy. It was nothing like what we see now. As everything expanded and took up more space, it cooled down. The tiny particles grouped together. They formed atoms. Then those atoms I grouped together. Over lots of time, atoms came together to form stars and galaxies. The first stars created bigger atoms and groups of atoms. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids, comets, planets, and black holes formed!
The huge collection of dust and gases then began to spin. As it spun faster and faster, the centre became very hot. It became the Sun. After billions of years the Earth (and us) formed from the atoms made inside stars - every atom in your body more complicated than hydrogen was made by a star at some point in the last 13.8 billion years. In all that time, the Universe has continued to expand. In fact, observations now tell us that the expansion of the Universe is getting faster.
To be continued >>>>