Mercury

- good essay. watch akward structures! Laolee Xiong Period 2 2/26/97 MERCURY                   atomic number 80 is the close-set(prenominal) satellite to the sun. Its average distance from the sun is approximately lviii integrity thousand million km and its diam is 4875 km, reservation it the second sm each(prenominal)est planet in our solar system. Its stack and mass atomic number 18 about 1/18 that of the earth and its average density is approximately capable to that of the earth. hydrargyrums magnetic field is atomic number 53-hundred times weaker than that of Earths. Mercury has the shortest revolution of all in all the planets in our solar system and revolves around the sun in about eighty-eight days. Radar observations of the planet show that its swarm of rotation is 58.7 days, or two-thirds of its period of revolution. That means that Mercury has one and one-half days in its year.         Mercur y doesnt have an atmosphere, serious it does have a thin layer of helium. The helium is really solar wind that is trapped by Mercurys weak gravity. Scientists figure that collisions with protoplanets early in the history of the solar system whitethorn have stripped away lighter materials, making Mercury a very dense planet with an iron cell nucleus extending outwards 4/5 of the way to the surface.

        Mercury bargons a very similar resemblance to our moon because it has a prospect of craters. The craters, which cover seventy-five percent of Mercurys surface, were formed by long rock s that smashed into the planets surface. Th! e largest crater is called the Caloris Basin and it is 1400 km in diameter and is flooded with molten lava. Mercury also has many cliffs that are usually over 300 miles long and two miles high. The remain of the planets surface is smooth and may have been formed by lava flowing out of cracks in the surface.         Temperatures on... If you want to get a full essay, order it on our website: BestEssayCheap.com

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