WTN- Centuries of scientific breakthroughs-from Chinese rockets  to Newtonian physics-laid the groundwork for 20^th –century spaceflight. Serious impetus took hold in mid century and played out actively amid cold war politics, as the Soviet Union and the United states staged a game of orbital one –upmanship , sending  satellites and humans into space.

Since the end of the Cold war, International cooperation has largely replaced competition .it has become common for countries to pool resources and share technology.

Even the most advanced methods of spaceflight continue to conform to the basic principles that Newton laid out nearly 400 years ago, however Every voyage into space, whether manned or unmanned  ,obey the law of gravity .Rocketry forms the back-bone of space exploration , and Newton’s third law of motion governs the principle behind the Rocket. The action is the high-speed escape of gas through the rocket’s nozzle, and the reaction is the forward movement  of the rocket. In 1957 a Soviet  rocket launched the first artificial satellite, sputnik I. Into space. United States responded with Explorer I the following year.
Ones satellites were successful, it was only a short wait until the first manned flight  into space took place. Various animals, from mice to dogs to a champ, were enlisted for preliminary tests.

Cosmonaut Yuri Gagarin edged out American astronauts with his path breaking launch in1961. Inaugurating the Apollo program in 1961, The United states took the lead in the moon race in 1969, landing Apollo II there on july20. The U.S. remains the sole nation to have accomplished manned extraterrestrial landings.

-Window To News