Solar System

Our Solar System

The solar system is a vast disc of material that is over 30 billion kilometres (19 billion miles) across, with the sun at the center and many other planets, dwarf planets, and many other small rocks called asteroids orbiting it. The planets are- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. More than 50 dwarf planets are orbiting the sun, some of them are- Pluto, Eris, Haumea, Makemake, Ceres, etc.

                                                                                                

Formation

The Solar system is formed about 4.6 billion years ago when a cluster of dust, gasses, and small rocks was pulled together by themselves by their own gravity inside a cosmic cloud. Then the collapsing mass gave birth to our sun, which was surrounded by a flattened spinning disk(The solar nebula) from which the planets formed...

Collapsing clump

Within the giant cloud, a pocket of gas and dust began to shrink because of the shock waves from the supernova (exploding stars), disturbing the cloud.

                                                                                                

                                                                

                                                                                                                

Spinning disk

As the clump Shrank It began spinning until it was
formed into a disk. Its center began to heat up as it
rotated faster and faster.

                                 

         

                                                                                                                                                                                    

The sun is born

In the dense center, a nuclear reaction began. Then the center started to shine like a star and the leftover matters formed a disk called the solar nebula.

                                                                     

                                                                                                                                                                          

Planetesimals

Then, the particles clump together by gravity to form billions and billions of tiny planets or planetesimals.

                                                                                   

                                                                                                                                                                                                           

Planets form

The planetesimals then crashed into each other and sticks together to form planets.

Migration                                                                      

All the giant planets then began to change. For even more distant orbit Neptune and Uranus moved farther pushing the cooler and icy bodies.

   

                                                                                                                                                                      

The solar system today

About 3.9 billion years ago, our solar system had settled down to its present pattern form of planets.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

References

1.Knowledge Encyclopedia Space! : DK publishers.

2.Nasa Science (https://science.nasa.gov/).