Earth

Blue planet is the third planet from the entire planet in the Solar System that we know the earth is very old, has reached the age of the earth 4.6 billion years old. Earth's distance from sun is 149, 6 million kilometers, or 1 AU (astronomical units). Earth has a layer of air (atmosphere) and the magnetic field is called (magnetosphere) which protect the Earth's surface from the solar wind, ultraviolet rays, and radiation from outer space. This air layer surrounds the earth to a height of around 700 kilometers. The air layer is divided into several parts, namely: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.

Earth has an ozone layer as high as 50 kilometers, which are in the stratosphere and mesosphere and protect the earth from ultraviolet rays. Earth's surface temperature difference is between -70⁰ C to 55⁰ C depending on the local climate.

Earth is estimated to consist of earth's inner core composed of nickel iron frozen thick 1370 kilometers with a temperature of 4500⁰ C, covered well by the liquid outer core that is 2100 kilometers thick, and covered also by 2800 kilometers thick silica coat formed 83% of the earth, and eventually completely covered by the crust thickness of approximately 85 kilometers. 

The crust is thinner on the seabed that is about 5 kilometers. The crust is divided to several parts and moving through the movement of tectonic plates that produces earthquakes.