of rock and various ices, with only about 15 hydrogen and a little helium (in contrast to Jupiter persuasive essay about becoming a firefighter and Saturn which are mostly hydrogen). The surface of Mercury is very much like the Moons with craters, mountains and valleys. The solar system consists of the Sun; the nine planets, 67 satellites of the planets and a large number of small bodies (comets and asteroids). They are known as minor planets. They have been found inside Earths orbit to beyond Saturns orbit. Various improvements have been seen in the study of the Solar system over the past few centuries.
Very short essay on solar system
The Greek philosopher Aristotle held that the earth is fixed at the center of the universe while Ptolemy based a mathematical model of the moving planets in our Solar System. Astronomy usually began with the Greeks. Researches are going on experimenting life on Mars. Asteroids Asteroids are rocky and metallic objects that orbit the Sun but are too small to be considered planets. It is the only planet on which life exists. One of the more apparent things that separate Venus from all the other planets in our solar system is that it rotates from east to west (all the other planets rotate from west to east). Because of Plutos eccentric orbit, Neptune is the last planet for 20 years every 247 years. It is slowly lengthening due to tidal friction between the oceans and the sea floor.