In the few pages to come you will find some facts about the planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
(figures in brackets state relation to earth)
mean distance from sun: 57.8 million km (0.39 AU)
period of revolution: 88 days
Rotational period: 58.6462 days
Tilt of axis: 0.00o
mass: 0.33*1024 kg (0.38)
mean diameter: ~4,400 km (0.35)
mean density: 5.43 g/cm3 (0.99)
elements and combinations to be found: silicate, iron, nickle
Atmospheric composition Helium: 42% Sodium: 42% Oxygen: 15% Other: 1%
surface structure: rocky, craters
surface temperature: -170°C to 400°C
Mercury is the planet in our solar system closest to the sun. It has a core of iron and nickle that makes up 80% of the planet's diameter. The Caloris basin has a diameter of about 1300 km, and is 9 km deep.