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Fascinating Facts
Relative Masses of the Planets

Solar system relative masses. Conceptual artwork showing the planets and Sun of our solar system as blocks of weights. Each solar system body is depicted in mass relative to the Earth. Pluto has the smallest mass compared to the Earth (0.002 times the Earth), whilst the Sun has the largest (332,831 times the Earth). The Sun contains 99.9 percent of the mass of the entire solar system. Mass is defined as the quantity of matter in a body as measured by its inertia. Masses can be compared to one another by weight of bodies at the same place. How Much Air and Water

Global water volume. Conceptual computer artwork of the total volume of the Earth's water, seen as a sphere, centred over Europe. It dramatically shows how finite the water supply on Earth actually is. The sphere measures 1390 kilometres across and has a volume of 1.4 billion cubic kilometres. These figures were calculated by adding the volumes of water in the oceans, seas, lakes, rivers, ground water and water in both ice caps and the atmosphere. The largest percentage (97%) of water is held in the oceans, with ice caps & glaciers accounting for a further 2%. The average depth of the ocean is 3.8 kilometres.

Global air volume. Conceptual computer artwork of the total volume of air within the Earth's atmosphere, seen as a sphere, centred over Europe. It dramatically shows how finite the available air supply actually is. The sphere measures 1999 kilometres across and weighs 5140 trillion tonnes. Although the atmosphere extends hundreds of kilometres above the Earth's surface, its density decreases progressively. Half of all the air in the atmosphere lies within the first 5 kilometres. Air is a mixture of gases that includes nitrogen (78%) and oxygen (21%). The reminder is made up of argon, carbon dioxide, neon and helium.

Caption: Global water and air volume. Conceptual computer artwork of the total volume of water on Earth (left) and of air in the Earth's atmosphere (right) shown as spheres (blue and pink). The spheres show how finite water and air supplies are. The water sphere measures 1390 kilometres across and has a volume of 1.4 billion cubic kilometres. This includes all the water in the oceans, seas, ice caps, lakes and rivers as well as ground water, and that in the atmosphere. The air sphere measures 1999 kilometres across and weighs 5140 trillion tonnes. As the atmosphere extends from Earth it becomes less dense. Half of the air lies within the first 5 kilometres of the atmosphere.

This was from, this site:
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