So do you really know how did our mother Earth form? Or why did it form?

- Formation of Earth

Around four and a half billion years ago, neither the Earth nor any of the other planets existed. There was just this vast dark very hit cloud of gas and dust swirling around the newly formed Sun. Gradually, the cloud cooled down and the gas began to condense into billions of water droplets. Slowly, these droplets then were pulled together into clumps by their own gravity - and they were carried on clumping until all the planets, including Earth, were formed. But it took about another half a billion years before the Earth had cooled enough to form a solid crust with an atmosphere around it.
- Process of the formation of the Earth

As the Earth orbits the Sun, the hemisphere of the planet which faces the Sun experiences summer while the hemisphere facing away from the Sun experiences winter.

- How long exactly is an Earth day?

An Earth day is the time when the Earth takes to rotate on its axis once. The stars come back to the same place in the sky every 23 hours 56 minutes 4.09 seconds (the sidereal day). Our day (the solar day) is 24 hours as the Earth is moving round the Sun and it must turn an extra 1 degree for the Sun to return to the same place in the sky.

- Why does the Earth spin?

The Earth spins as it is falling around the Sun. As the Earth hurtles round the Sun, the Sun's gravity keeps it spinning, just as the Earth's gravity keeps a ball rolling down hill. 

- What is the Earth made of?

The Earth has a core of iron and nickel, and a rocky crust which is made mostly of oxygen and silicon. In between is the soft hot mantle of metal silicates, sulphides and oxides.

- How big exactly is the Earth?

Satellite measurements show it is 40,024 km (24,870 miles) around the equator and 12,578 km (7,927 miles) across. The diameter at the poles is slightly less, by 43 km (26.7 miles).

- Who was Copernicus?

In the 1500s, most people thought that the Earth was fixed at the centre of the universe, with the Sun and the stars revolving around it. However, Nicolaus Copernicus (1473 - 1543) was the polish astronomer who first suggested that the Earth was actually revolving around the Sun and not the other way round.

Here, let watch an interesting video on the birth of the Earth. Enjoy!