It has been a long research as to what and how does the Earth formed. Billions of years ago, as the planets were being formed into the chaotic universe, there were a lot of collisions which explains the formation of Asteroids between Mars and giant Jupiter. Then now, there has been findings that supports that Earth was formed due to a collision of two Planets. According to new research, what formed the planet that we live on today and also created the moon was a ‘violent, head-on collision’ between Earth and a developing planet called Theia. A ‘planetary embryo’ called Theia, thought to be around the same size as Earth or Mars, collided with Earth 4.5 billion years ago with the two being effectively melded together to form a single planet, says the study. Theia is a hypothesized ancient planetary-mass object in the early Solar System. According to the hypothesis, Theia was an Earth trojan about the size of Mars, with diameter approximately 6,000 km (3,700 miles). Theia was n