The earth is the third planet and the largest of the planets. Surprisingly, and this is only the fifth largest regarding size and mass of the world, it is the densest (5,513 kg / m3) of all the planets.
Let’s take some moment of our time and read about some interesting facts you probably don’t know about the earth.
The earth was formed about 4.54 billion years and currently it is the only planet known to support life.
The Earth is the densest planet in the solar system. The density of the Earth is different in every part of the globe – the kernel is very much denser than the Earth’s crust – but the average density of the globe is about 5.52 grammes per cubic centimetre.
The earth is fragile. Its surface is divided into plates (tectonic plates) floating on the rocky mantle, its crust and its core liquids. The interior of the Earth is active and earthquakes, volcanoes and mountain building has been constructed along the boundaries of tectonic plates.
The earth is not a perfect sphere; diameter of the north and south poles is slightly smaller than the diameter of the equator. The polar diameter is 7,891 miles or 12,700 kilometres.
The earth is much different from all other planets because it has a great diversity of life and intelligent beings.
The moon is considered as the only natural satellite of the Earth. It is also known as the largest satellite in the solar system. In real terms, however, it is the fifth largest natural satellite known.
The rotation of the Earth is very slow, about 17 milliseconds per century. In future time, it will lengthen the hour of the days, but it will be about 140 million years before our day will be increased from 24 to 25 hours.