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Essay On Terrestrial Planet

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The terrestrial planets also known as ‘ Inner Planets’ or the ‘rock planets’ are earth-like planets. The word ‘terrestrial’ comes from the word ‘telluric’ which is derived from the Latin words ‘tera’ and ‘tellus’ which means Earth. The terrestrial planets consist of the innermost planets, which are Mercury, Venus, Earth and Mars (in order of their distances from the Sun). These types of planets are made up of silicate rocks with molten heavy metal core. Their atmospheres range from thick to very thin. They have few moons and also topological features such as valleys, volcanoes and craters.
One of the terrestrial planets is Mercury, it is the closest to the Sun, the smallest of the eight planets in our solar system, with a diameter of 4,879 km and also is …show more content…

Mercury is the second densest planet after Earth. Even though it is very small in size, it is composed mainly of heavy metals and rock which make it very dense. Mercury has a large iron core that is around 40 % of its volume in its center whose radius is 1800 to 1900 km. Some also believe that its core is molten. This planet is named after the messenger of the Roman gods, known as Hermes in Greek mythology. This is because of the speed in which Mercury orbits the Sun and the speed with which Mercury the Roman deity was able to deliver messages. This planet has just 38% of the gravity on Earth and so it isn’t able to hold the atmosphere it has, instead it gets blown away by solar winds thus it has a very thin atmosphere. However the same solar winds bring new gases, radioactive decay and dust which helps to replenish the atmosphere. Due to its low of gravity and lack of atmosphere, Mercury has no moons or rings. Mercury’s orbit is an ellipse rather than circular. In fact it has the least circular orbit of all the planets but the most eccentric. Another interesting fact about Mercury is that it is the only the second the hottest planet. Even though Venus is farther

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