| The first Space Exploration started in 1957 with the | | | | of Space Exploration terms are Comets and |
| launch of the first artificial satellite, Sputnik 1, sent into | | | | Asteroid's. A comet is basically small, rocky, and icy |
| space by the Soviets. Since ancient times people have | | | | and revolves around the sun. When a comet passes |
| dreamed of leaving their home planet and exploring | | | | close to the sun some of the ice turns to gas. This gas |
| other worlds not known to man. Every era through out | | | | and some loose dust creates a long, bright tail that |
| history has had a belief as to what the "heavens" are | | | | trails behind the comet.If a comet was to hit the earth, |
| made form. The Greeks believed that the stars and | | | | it would cause some serious damage. As an example |
| space were made of a material called "Quitenses", | | | | even if something relatively small in size hit the earth, it |
| and other culture once thought that the stars were | | | | would cause great damage. Small from an comet's |
| made of their peoples passed away.We know now | | | | point of size is around 200 metres in diameter and if |
| what stars are really made of; they are made of | | | | this was to hit an ocean it would create devastation to |
| various gases that explode over and over again. Up | | | | all cities within a large radius.Asteroid's are described |
| until about 43 years ago people did not have the | | | | as small or minor planets that are members of the |
| means to travel to or send objects into space. The | | | | solar system and move in what are called elliptical |
| hardest part of traveling into space was developing | | | | orbits. They are usually found between the orbits of |
| rockets that were powerful enough and reliable | | | | Mars and Jupiter. |
| enough to boost an object into space.Common heard | | | | |