(共34张PPT)
The History
The Present
The Future
What we need
Space Exploration
History
Space has always been the final frontier for mankind and space exploration is the key to discovering the immense universe that surrounds our planet. Since ancient times, people have dreamed of leaving their home planet to explore other worlds.
In the second century AD a Greek writer named Lucian wrote a story about a trip to the moon. He did not even know how far the moon was but his story revealed that the idea of space travel was certainly not new.
Much later in 1865, the French novelist Jules Verne wrote a story in which his travelers were fired from the earth to the moon in a hollow globe shot out of the barrel of a big gun. He was careful to give the correct speed, 11.2 km/s which is the escape velocity of earth.
Serious work on space exploration started after the 1950’s when rocketry and rocket science understanding and engineering made it possible to reach outer space. This was the beginning of a new era in human history and the discovery of space exploration started.
In 1957, the Russians successfully launched the first satellite Sputnik-I, carrying a radio transmitter.
The first American satellite Explorer-I followed in the subsequent year.
in 1961, Vostok-I the first manned space flight by the Russian cosmonaut Yuri Gagarin was launched.
In 1969,Neil Armstrong became the first person to land on the surface of the Moon.
Present situation of space exploration
1、United States is leader in space exploration
2、Russia reshapes the image of Aerospace
3、The present situation of China's space exploration
The USA
The United States is earlier explorer in space activities, and has the highest technological level of space exploration.
The USA
美国利用“阿波罗”计划剩余的土星运载火箭和载人飞船作为运输系统以及积累的技术成果,将“土星”5号运载火箭的末级改装成了美国第一个试验性空间站“天空实验室”。American Saturn launch vehicles and manned spacecraft "Apollo" plan remaining as the transport system as well as the accumulation of technological achievements, "Saturn" the final stage modified carrier rocket became the first experimental space station "Skylab
天空实验室的结构Skylab’s structure
Perform a spacewalk to repair Skylab
The USA
In the early 1980s, in order to meet the challenges of industrialization and militarization of space in the 21st century, the United States began the plan of the construction of the space station.
The internal structure of the International Space Station
International Space Station
The USA
Space shuttle is a multipurpose spacecraft with important civilian and military value. It means a major leap in the development of U.S. aerospace technology.
the landing of the Endeavour space shuttle
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Russia
The former Soviet Union regarded manned space flight as an important part of the entire space program. With the principle of “step by step”, S.U. gradually formed a relatively complete manned spaceflight system and played an leading role in manned space in the early stages of development of the human manned space
Former Soviet cosmonaut Yuri Gagarin
Soviet Buran space shuttle
"Salyut" space station
October 15, 2003, China's first manned spacecraft Shenzhou V successfully launched. Since then, China becomes one of the world's first three countries which master manned space flight technology.
China
Shenzhou VIII’s successful launch and docking with Temple One marked that China has initially mastered the technology of space rendezvous and docking capability, that is the construction of simple space lab and short-term space station.
China
Shenzhou VIII and Temple One successful docked
In near future, the earth?will?be too crowded?for?people?to?live?in. Human needs to find new ways to?sustain?human?development. ?
Space station:
Space station is relatively static spacecraft in the outer space for people to work and live in the long turn.
It can be predicted that in the future, we can make colossal space station which functioned as a small planet, just like a harbor for spaceship and the paradise in the space.
Wormhole is the narrow tunnel that connect the two different time and space.
虫洞是连接两个不同的时间和空间狭窄的隧道。
It can help you return to former or go to future.它可以帮助你恢复前或到未来。
Wormhole虫洞
Scientists study worm hole and find that worm holes might exist between distant star.
They build stargates to connect?galaxies?and?
solar systems?
Mankind?use these ways?to travel?outside?of the?solar system?and?planets thousands of?light-years away?have?been colonized.?
The?pioneers build intermediate?base on the new planet to prepare for the large number?of?immigrants.
Simulative Circulating ecosystem(模拟生态循环系统)
water, food, oxygen, if these living necessaries are all carried from earth and abandoned after use, it would be a huge waste. Making a circulating system can use this substance circularly, and decrease the demand of energy.
What do we need for space exploration?
Space food
Space food are food products, which are specially created and processed for consumption by astronauts in outer space. The food has specific requirements of providing balanced nutrition for the health of individuals working in space. In recent years, space food has been used by various nations engaging on space programs as a way to share and show off their cultural identity and facilitate intercultural communication.
Space food in early history
Early space food are mainly some squeeze tubes and lack variety.
Astronauts in early missions disliked the food that was provided. They ate freeze-dried powders, and tubes of semi-liquids. The astronauts found it unappetizing, and did not like having to squeeze tubes or collect crumbs.
Space food in modern times
Today, astronauts also have a greater variety of food to choose from, and many request personalized menus from lists of available foods including items like fruit salad and spaghetti.
Astronauts sometimes request beef jerky for flights, as it is lightweight, nutritious, and can be eaten in orbit without packaging or other changes.
Here are space foods from different countries:
Chinese: specially processed yuxiang pork (鱼香肉丝), Kung Pao chicken (宫保鸡丁), and Eight Treasures rice (八宝饭), and Chinese herbal tea.
Japanese: The Japan Aerospace Exploration Agency (JAXA) have developed traditional Japanese foods and drinks such as matcha(抹茶),ramen(拉面), sushi(寿司), soups, for consumption in orbit. The foods have been produced in collaboration with Japanese food companies such as Nissin Foods(日清食品).
Then
what else do we need,
apart from food?
Spacecraft Equipped With Giant Solar Sails(太阳帆)
Traditional rockets are likely to run out of energy when travel the long distances between planets and stars. That's why scientists have been working to develop alternative methods of power and energy sources for rockets.
One huge advantage of a solar sail would be that, unlike a rocket engine, it would cause a spacecraft to continually, steadily accelerate, so that the craft eventually would reach an extremely high rate of speed.
Recycling Air and Water in Deep Space
Another thing that astronauts will need in space is supplies of both breathable air and drinkable water. That's why scientists are working to develop recovery systems that will provide a spacecraft with as much oxygen as possible. Also, it can separates the actual water from waste materials, microorganisms and other contaminants.
By 2014, researchers expect to have the ability to recover as much as 75 percent of the oxygen from the carbon dioxide that astronauts breathe out, and by 2019, they hope to achieve 100 percent recovery.
Most of all
Curiosity
motive powers which encourage human beings to explore the unknown
Bravery
Thank you!