Space Exploration is the expedition to use space travel to find out the nature of the cosmos beyond Earth. Ever since ancient times, people have dreamed of leaving their home planet and exploring other worlds. In the later half of the 20th century, that dream became realism. The space age began with the launch of the first artificial satellites in 1957. A human first went into space in 1961. Since then, astronauts and cosmonauts have ventured into space for ever-greater lengths of time, even living aboard orbiting space stations for more than a year. Two dozen people have circled the Moon or walked on its surface. At the same time, robotic explorers have journeyed where humans could not go, visiting all but one of the solar system’s main worlds. Unpiloted spaceships have moreover visited a host of slight bodies such as moons, comets, and asteroids. These explorations have sparked the advance of new technologies, from rockets to communications equipment to computers. Spacecraft studies have yielded a price of scientific discoveries about the solar system, the Milky Way Galaxy, and the universe. And they have given humanity a new perspective on Earth and its neighbors in space.(Andrew Chaikin, B.A (2005)
The primary confront of space study was increasing rockets controlling enough and consistent enough to improve a satellite into orbit. These boosters required more than bully energy, conversely; they moreover needed guidance systems to maneuver them on the appropriate flight paths to attain their preferred orbits. The next confront was building the satellites themselves. The satellites required electronic workings that were frivolous, however strong enough to resist the speeding up and quivering of launch. Creating these components required the world’s aerospace engineering facilities to take on new principles of consistency in manufacturing and testing. On Earth, engineers also had to build tracking stations to maintain radio communications with these artificial “moons” as they circled the planet............
