人類歷史上的重大事件(英語)

1、精選ppt精選ppt The first artificial Earth satellite, Sputnik I , went into orbit on 4th October 1957 ,closely followed in the next month by Sputnik II. The first object to reach the moon from earth was the probe Lunik II in September 1959. In 1962 John Glenn orbited the Earth three times in the first Me

2、rcury craft to be boosted by an Atlas rocket ,and in June 1963 ,Valery Bykovsky set the five-day endurance record in space .The following year ,Alexei Leonove completed the first space walk .精選pptOn July 20th 1969,Neil Armstrong became the first man to set foot on the Moon , the climax of an intensi

3、ve American space programme. 視頻：人類第一次登月精選pptDuring the next few years several manned and automatic probes were launched into space; on the Apollo（阿波羅） 15 mission, a lunar-roving vehicle collected a wide range of samples for analysis. Apollo 16 brought back over 91 kg of Moon rock and in December 197

4、2, the last lunar landing was made by Apollo 17. 精選ppt We are now able to observe the celestial bodies（天體）（天體）with orbiting observatories that are sent out into space and relay astronomical information back to Earth: artificial satellites have been used for surveying; studying the electromagnetic and gravitational fields which surround the Earth; in communication when relaying television signals, and in meteorological observation. 精選ppt Mans footstep on moon achieved the dream of human beings for thousands of years, made the myth of chang e in