Mercury

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Hii , welcome to my post . Today we are going to know about Mercruy (planet). So let's start :

Definition :
• Mercury is the smallest planet in the Solar system
  and the closest to the Sun.
• Its orbit around the Sun takes 87.97 Earth days, the
  shortest of all the Sun's planets.
• It is named after the Roman god Mercurius (Mercury),
  god of commerce, messenger of the gods, and
  mediator between gods and mortals, corresponding
  to the Greek god Hermes.
• Like Venus, Mercury orbits the Sun within Earth 's 
   orbit as an inferior planet.
• Its apparent distance from the Sun as viewed from
  Earth never exceeds 28°. 
• This proximity to the Sun means the planet can only
   be seen near the western horizon after sunset.

Facts :
 • Mercury rotates in solar system in unique way.
 • Mercury is the planet that orbits the closest to the
   Sun.
 • Mercury is the smallest planet in our solar system –
   only slightly larger than Earth's moon.
 • Mercury is the fastest planet in our solar system –
   traveling through Space at nearly 29 miles (47
   kilometers) per second. 
 • The closer a planet is to the Sun, the faster it travels.
    Since Mercury is the fastest planet.
 • It  has the shortest distance to travel around the Sun, 
 • It has the shortest year of all the planets in our solar
   system – 88 days.
 • Mercury is a rocky planet, also known as a terrestrial
   planet.
 • Mercury has a solid, cratered surface, much like the
   Earth's moon.
 • There are no rings around Mercury. 
 • Mercury has no moons. 
 • It is unlikely that life as we know it could survive on
   Mercury due to solar radiation, and extreme
   temperatures.
 • Standing on Mercury's surface at its closest
   approach to the Sun, our star would appear more
   than three times larger than it does on Earth.

Quick Facts :
• Mass (1024kg)--------                    0.33
• Diameter (km)-------                      4879
• Density (kg/m3)-------                    5427
• Gravity (m/s2)------                        3.7
• Escape Velocity (km/s)------         4.3
• Rotation Period (hours)------         1407.6
• Length of Day (hours)------            4222.6
• Orbital Period (days)------              88
• Orbital Velocity (km/s)-----            47.4
• Orbital Inclination (degrees)------  7
• Orbital Eccentricity-------                0.205
• Obliquity to Orbit (degrees)-------  0.034
• Mean Temperature (C)-------          167
• Surface Pressure (bars)------          0

Composition: 
• Mercury is a terrestrial planet, like like all of the 4
  inner planets: Mercury, Venus, Earth and Mars.
• It’s the smallest of them, and has a diameter of only
  4,879 km at its equator. 
• Mercury's thin atmosphere, or exosphere, is
  composed mostly of oxygen (O2), sodium (Na),
  hydrogen (H2), helium (He), and potassium (K).

Structure: 
• Mercury is the second densest planet, after Earth. 
• It has a large metallic core with a radius of about
  1,289 miles (2,074 kilometers), about 85 percent of
  the planet's radius. 
• There is evidence that it is partly molten or liquid.
• Mercury's outer shell, comparable to Earth's outer
  shell (called the mantle and crust), is only about 400
  kilometers (250 miles) thick.
   (i) Crust: 
    • The crust is similar in appearance to the that of the
       Moon with mare-like plains and heavy cratering.
   •  A distinctive feature of the surface crust is the
      presence of numerous narrow ridges, which might
      have formed as Mercury's core and mantle cooled
     and contracted after the crust had solidified.   (ii) Core :
   •  Mercury's extreme high density infers that the
      planet has a large, iron-rich core, with higher iron
      content than that of any other major planet in the
      Solar System.

                                 Thank you.

In this post i have given information only about Mercury. The other parts of Solar System will be described in further posts .

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