1. Large semi-axle 57,909,176 km 
  2. Distance to perihelion 46.001,210 km 
  3. Distance to aphelion 69.816,927 km 
  4. Average orbit speed 47.87 km/s 
  5. Average radius approx. 2432 km 
  6. Inclination of the equator in orbit 0.01 ° (slightly). 
  7. Surface temperature 90 - 700 K 
  8. Distance from Earth 82.000.000 km

As we know, the planet Mercury is closest to the Sun and therefore surrounds it in 88 days. Mercury is a simple but wonderful planet. According to several studies, it can be seen with special devices on the ground after sunset. And while we enjoy the heat on Earth, it's not the same on Mercury, there, even if it's hard to believe, Mercury cools. Don't think it's Neptune, it's getting a little cold. Because of this, it contracts 7 km from the radius, it's not much on us, but for a planet it's a lot and a few meters, at this moment it has a radius of approx. 2430 km, so small horses? It is only slightly longer than the Romania-France distance. Mercury is full of craters, it doesn't even have satellites, you don't know the weather, because it varies between 90 K and 700 K, so no chance to step on it, especially since the craters are super cold.The largest known crater in the Caloris Basin, with a diameter of 1,300 km. Do not think that Mercury was observed by who knows what researchers, not, in any case, for the first time, according to the data we have now, by the Sumerians.

Mercury is also a very sophisticated planet, it has a large composition of substances, difficult to remember. 31.7% potassium 25% sodium 9.5% atomic oxygen 7.0% argon 6% helium 5.6% molecular oxygen 5.2% nitrogen 3.6% carbon dioxide 3.4% water 3.2% hydrogen So yes, there are a lot of them. But even though it resembles the Moon, not Earth, Mercury also has something in common with Earth, the type of planet. Like the earth, it is a telluric planet. 

And since all the planets also have a nucleus, mantle and crust, below you have some dimensions approx. 1. Crust - 160 km thick 2.Manta - 600 km thick 3. Core - 3,595 km in diameter So as you edit the core takes up the most. It contains about 70% metals and 30% silicates.