8. The Earth's tectonic plates, which collide with each other and are responsible for everything from earthquakes to mountains being formed, also play a vital role in maintaining the planet's ...

8 planets orbit the Sun. The closest are the four rocky planets, the remaining gas planets inhabit deeper space. The solar system is also home to many other cosmic bodies including asteroids ...

This extraordinary celestial event will see the sky scattered with seven visible planets in what is known as a great planetary alignment. The eight planets in our solar system orbit the sun in ...