Dyson Sphere Project Silicon Mine Mercury, the first satellite of the sun, is the most abundant.

In the solar system:

Mercury: The mantle and crust are mainly composed of silicates. The surface air is extremely thin, with 42% hydrogen, 42% sodium and 15% oxygen.

Venus: It is mainly covered by basalt, and carbon dioxide in the surface atmosphere accounts for about 97%.

Earth: It is mainly covered by water and rocks. There are 78% nitrogen and 265,438+0% oxygen in the surface atmosphere.

Mars: The surface is mainly desert and rock, and the atmospheric density is only 1% of the earth's atmospheric density, mainly carbon dioxide.

Jupiter: It may have an iron-silicon core with a gaseous surface, which is mainly composed of 80% hydrogen and 18% helium. It is called a gaseous planet.

Saturn: Metal compound of rock core, ice crust, hydrogen and molecular hydrogen, considered as a liquid planet. There are 82 satellites.

Uranus: It is composed of rocks and ice, with hydrogen accounting for 83% and helium accounting for 15% in the atmosphere.

Neptune: Stone core, ice crust, the atmosphere is mainly composed of hydrogen and helium, but also a small amount of methane.

Pluto: It is a dwarf planet, which may be composed of rocks (70%) and ice (30%). The atmosphere is extremely thin, and the main component is nitrogen.

Comet: It is composed of ice, methane, ammonia and dust.

Sun: The sun is made of plasma. 7 1% hydrogen, 26% helium and a small amount of heavy elements.