VOA慢速英语2009-EXPLORATIONS - Project Mercury: The US Space

VOICE ONE:

EXPLORATIONS -- a program in Special English by the Voice of America.

(SOUND)

That announcement was made May fifth, nineteen sixty-one. It was the first manned flight of project Mercury. Today, Tony Riggs and Larry West tell about the beginning of the United States space program that carried humans into space.

VOICE TWO:

The United States entered the Space Age in nineteen forty-five, at the end of World War Two. German rocket scientists, with the support of the German government, had spent fifteen years developing rockets as weapons. Near the end of the war, Germany began firing huge rocket bombs at Britain.

Called V-2 rockets, the German weapons carried a ton of explosives three hundred twenty kilometers. They flew as high as eighty kilometers.

When the war ended, American forces found the parts for about one hundred V-2 rockets. They brought the German rockets to America and launched sixty-six of them.

VOICE ONE:
　
An Army test of the V-2 rocket

The army opened the V-2 launch program to American scientists at several universities. Civilian¹ scientists used the V-2 rockets to study the Earth's atmosphere. They gathered much new information and learned much about designing instruments for scientific rockets and satellites.

Many of Germany's top rocket scientists came to the United States after the war. They worked with American scientists and engineers to develop and test new rockets for military and scientific use. In nineteen fifty-six, the United States launched a Jupiter military rocket that flew more than five thousand kilometers.

VOICE TWO:

Military officials immediately offered to use the Jupiter to put a scientific satellite into orbit around the Earth. But the American government said no. Officials decided² not to mix military and civilian rocket programs. The United States said it would not launch a scientific satellite until a non-military rocket -- the Vanguard -- could be completed to carry it into space.

Navy scientists were building the Vanguard for scientific purposes. They planned to launch it in nineteen fifty-eight.

The twenty-two meter long rocket would put a little scientific satellite into orbit as one of the events of the international geophysical year. The satellite itself would weigh less than two kilograms. But it would contain many tiny electronic instruments for scientific research.

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VOICE ONE:

Soviet³ scientists also were working on rockets and satellites.
　
Sputnik 1

In nineteen fifty-seven, a Soviet military rocket carried a small satellite into Earth orbit. The eighty-three kilogram satellite, called Sputnik, had two radios that sent signals as it circled the world. One month later, a larger Sputnik was launched with a dog inside. The dog survived the launch. But there was no way to return it to Earth. So it died in space.

A few months later, the Soviet Union put a one thousand three hundred sixty kilogram satellite into space.

VOICE TWO:

The Soviet successes with its Sputnik satellites caused the United States to change its space plans. Officials decided to launch the Vanguard as soon as possible.

The attempt was made on December sixth, soon after the first two Sputnik launches. The attempt failed. The rocket exploded during the launch. Less than two months later, however, the United States put its first satellite into orbit.
　
The launch of Explorer 1

The rocket was an army Jupiter. The satellite was Explorer One. It weighed only fourteen kilograms. But it carried a great many electronic instruments for scientific research.

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The instruments reported much new information about conditions in space. The most important was the discovery of a belt of radiation around the Earth. It was what we now call the Van Allen Belt.

VOICE ONE:

Support was growing, in Congress and among scientists, for a United States civilian space agency. Soon, Congress passed a bill creating NASA -- the National Aeronautics⁴ and Space Administration. President Eisenhower signed the bill into law.

Its job: the scientific exploration of space. Its major goal: sending the first Americans into space.

VOICE TWO:

The new space agency was given a lot of money and thousands of engineers and technicians from military and civilian agencies. Within three months, the man-in-space program had a name: Project Mercury. The name came from the ancient Greeks. Mercury was the speedy messenger of the Greek gods.

Much work had to be done before Project Mercury could put an American astronaut into space. Dependable rockets needed to be built and tested. A spacecraft had to be designed and built. A worldwide radio system was needed to communicate with orbiting astronauts. And astronauts had to be chosen and trained.

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VOICE ONE:

To save time, NASA decided to work on all parts of the program at the same time. It placed orders for four different kinds of military rockets for Mercury flights. It chose the McDonnell Aircraft Company to design and build the Mercury spacecraft. And it began to look for men who would be astronauts.

NASA said its astronaut candidates had to be between twenty-five and forty years old and in excellent health. They could be no taller than one hundred eighty centimeters. Candidates had to be highly intelligent, with an education in science or engineering.

NASA also said the first astronauts had to be military pilots with experience in test flying airplanes. Test pilots already were trained to make quick, correct decisions in dangerous situations.

VOICE TWO:
　
The seven Project Mercury astronauts

One observer said in a joking way that the space agency was just looking for a group of "normal, everyday supermen." But it was not a joke. NASA found seven normal, everyday supermen in a group of five hundred candidates.

On April seventh, nineteen fifty-nine, the space agency introduced the first American astronauts. They were Scott Carpenter, Gordon Cooper, John Glenn, Virgil Grissom, Walter Schirra, Alan Shepard and Donald Slayton.

All were married and had children. All were from small towns or cities. All were about the same height, weight and age. And all were experienced military test pilots.

VOICE ONE:

Each of the new astronauts, however, brought his own special knowledge and skills to the Mercury project.

Navy pilot Scott Carpenter, for example, was well trained in communications and navigation. So he helped with Mercury's communications and navigation systems. Walter Schirra, another Navy flier, was an expert on the pressure suits worn by navy divers⁵. He helped design the space suits that would protect the Mercury astronauts in space.

VOICE TWO:

Air Force pilot Gordon Cooper became an expert on the Redstone Rocket that would launch Mercury astronauts on short training flights. Donald Slayton, another Air Force flier, worked on the long-range Atlas⁶ Rocket. Marine⁷ John Glenn was an expert on airplane instruments. So he helped design easy-to-use instruments for the Mercury spacecraft.

Navy pilot Alan Shepard helped plan Mercury's worldwide communication system. And Virgil Grissom, of the Air Force, worked on Mercury's electrical systems.

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VOICE ONE:

NASA made its first unmanned test flight of the Mercury spacecraft nine months after the project started. The launch was made from the space center at Cape⁸ Canaveral, Florida. The flight tested the heat shield. The shield protected the spacecraft from the great heat produced when it returned through the Earth's atmosphere.

Many other unmanned test flights followed in the next two years.

The final test flight was made at the end of January, nineteen sixty-one. It carried a chimpanzee named Ham on a seven hundred kilometer flight over the Atlantic Ocean. Several problems developed. But Ham survived the launch and the landing in the ocean. However, he never wanted to get close to a space capsule again.

VOICE TWO:

Space officials announced that astronaut Alan Shepard would become the first American in space. He would be launched early in May, nineteen sixty-one, on a short, fifteen minute flight. That will be our story next week.

(MUSIC)

VOICE ONE:

You have been listening to EXPLORATIONS -- a program in Special English by the Voice of America. It was written by Marilyn Rice Christiano and Frank Beardsley. Your narrators were Tony Riggs and Larry West. I'm Shirley Griffith. Listen again next week to the second part of the story of the Mercury program that took the first American astronauts into space.

1 civilian   

adj.平民的，民用的，民众的

参考例句：

• There is no reliable information about civilian casualties.关于平民的伤亡还没有确凿的信息。
• He resigned his commission to take up a civilian job.他辞去军职而从事平民工作。

2 decided   

adj.决定了的，坚决的；明显的，明确的

参考例句：

• This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
• There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。

3 Soviet   

adj.苏联的，苏维埃的；n.苏维埃

参考例句：

• Zhukov was a marshal of the former Soviet Union.朱可夫是前苏联的一位元帅。
• Germany began to attack the Soviet Union in 1941.德国在1941年开始进攻苏联。

4 aeronautics   

n.航空术，航空学

参考例句：

• National Aeronautics and Space undertakings have made great progress.国家的航空航天事业有了很大的发展。
• He devoted every spare moment to aeronautics.他把他所有多余的时间用在航空学上。

5 divers   

adj.不同的；种种的

参考例句：

• He chose divers of them,who were asked to accompany him.他选择他们当中的几个人，要他们和他作伴。
• Two divers work together while a standby diver remains on the surface.两名潜水员协同工作，同时有一名候补潜水员留在水面上。

6 atlas   

n.地图册，图表集

参考例句：

• He reached down the atlas from the top shelf.他从书架顶层取下地图集。
• The atlas contains forty maps,including three of Great Britain.这本地图集有40幅地图，其中包括3幅英国地图。

7 marine   

adj.海的；海生的；航海的；海事的；n.水兵

参考例句：

• Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
• When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。

8 cape   

n.海角，岬；披肩，短披风

参考例句：

• I long for a trip to the Cape of Good Hope.我渴望到好望角去旅行。
• She was wearing a cape over her dress.她在外套上披着一件披肩。