Go Astr☾nomy

Mercury ☿
Planet Mercury

☿ Mercury: The Iron Planet     

Mercury is the first of eight planets in our solar system, and is 85% composed of a solid iron core with a thin cratered crust. Planet Mercury moves from the morning sky to the evening sky several times a year. It never deviates far from the sun so can be hard to locate. It is the smallet and the most cratered planet in the solar system.

Mercury Facts
      1. Mass (kg)
      2. 3.303e+23
      1. Radius (km)
      2. 2,439.7
      1. Density (gm/cm3)
      2. 5.42
      1. Distance from sun (km)
      2. 57,910,000
      1. Rotational period (days)
      2. 58.6462
      1. Orbital period (days)
      2. 87.969
      1. Orbital velocity (km/sec)
      2. 47.88
      1. Eccentricity of orbit
      2. 0.2056
      1. Tilt of axis (°)
      2. 0.00
      1. Inclination of orbit (°)
      2. 7.004
      1. Surface gravity (m/sec2)
      2. 2.78
      1. Escape velocity (km/sec)
      2. 4.25
      1. Albedo
      2. 0.10
      1. Magnitude (Vo)
      2. -1.9
      1. Surface temperature
      2. 179°C to -173°C
      1. Atmosphere
      2. He=42%, Na=42%, O2=15%
      1. Moons
      2. 0


    Mercury Surface Map

    Mercury surface map


    Mercury vs. Earth ratios


    diameter = 0.38
    gravity = 0.38
    surface pressure = 0
    solar irradiance = 6.7
    day = 176
    year = 0.24
    sun distance = 0.39

      
    diameter = 1
    gravity = 1
    surface pressure = 1
    solar irradiance = 1
    day = 1
    year = 1
    sun distance = 1



    Find your inner astronomer. Guide to amateur astronomy.